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1,718 results on '"Marti G"'

1. Thermographic Evaluation of the Duration of Skin Cooling After Cryotherapy in Dogs Following Tibial Plateau Leveling Osteotomy Surgery

Author

Sang Chul Woo, Jack Lee, Darryl L. Millis, and Marti G. Drum

Subjects
cryotherapy, thermography, physical therapy, TPLO, rehabilitation, Veterinary medicine, SF600-1100
Abstract

ObjectiveTo evaluate the duration of cooling after cryotherapy on the skin over stifle joints in dogs after tibial plateau leveling osteotomy (TPLO) surgery using thermography.Materials and MethodsSeventeen client-owned dogs of various breeds were enrolled in the study. Dogs underwent TPLO surgeries, and on the next day, thermal imaging was performed on the operated stifle prior to cryotherapy for baseline. Orthogonal views were repeated at 30-min intervals until the skin over the stifle had thermally equilibrated. An ice pack was applied for 20 min on the medial and lateral aspects of the stifle. Each stifle was then re-imaged every 15 min for the first 60 min then every 30 min subsequently until the temperature was within 1°C of the pre-cryotherapy temperature.ResultsMean skin temperature of the medial view showed no significance difference compared to baseline value at 45 min after cryotherapy was discontinued and after 60 min for the lateral and cranial views. Mean skin temperature was overall higher in the medial view compared to the lateral and cranial during the rewarming period (except immediately after cold application). Mean skin temperatures of all views combined showed a significant decrease in temperature during cryotherapy application, with a slow increase until a plateau was reached after 45 min of rewarming.Conclusions and Clinical RelevanceDogs undergoing TPLO for cranial cruciate ligament injury showed quicker rewarming period of superficial tissues compared to previous studies. Cryotherapy is a beneficial modality to reduce superficial tissue temperature in dogs undergoing TPLO, acknowledging that these dogs may require more frequent cryotherapy post-operatively due to more rapid rewarming time compared to dogs without surgery.

Published
2022
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2. AZGP1 deficiency promotes angiogenesis in prostate cancer.

Author

Lam, Nathan, Polasko, Alex, Chiu, Chun-Lung, Zhang, Dalin, Cho, Sanghee, Karageorgos, Grigorios, McDonough, Elizabeth, Chadwick, Chrystal, Ginty, Fiona, Jung, Kyeong, Machiraju, Raghu, Mallick, Parag, Crowley, Laura, Pollack, Jonathan, Zhao, Hongjuan, Pitteri, Sharon, Brooks, James, Wen, Ru, Qiu, Zhengyuan, Marti, G, Peterson, Eric, Marques, Fernando, Bermudez, Abel, Wei, Yi, and Nolley, Rosie

Subjects
AZGP1, Angiogenesis, Fibrosis, Prostate cancer, Tumor microenvironment, Male, Animals, Prostatic Neoplasms, Humans, Neovascularization, Pathologic, Cell Line, Tumor, Cell Proliferation, Cell Movement, Mice, Knockout, Glycoproteins, Neoplasm Invasiveness, Mice, Gene Expression Regulation, Neoplastic, Angiogenesis, Zn-Alpha-2-Glycoprotein
Abstract

BACKGROUND: Loss of AZGP1 expression is a biomarker associated with progression to castration resistance, development of metastasis, and poor disease-specific survival in prostate cancer. However, high expression of AZGP1 cells in prostate cancer has been reported to increase proliferation and invasion. The exact role of AZGP1 in prostate cancer progression remains elusive. METHOD: AZGP1 knockout and overexpressing prostate cancer cells were generated using a lentiviral system. The effects of AZGP1 under- or over-expression in prostate cancer cells were evaluated by in vitro cell proliferation, migration, and invasion assays. Heterozygous AZGP1± mice were obtained from European Mouse Mutant Archive (EMMA), and prostate tissues from homozygous knockout male mice were collected at 2, 6 and 10 months for histological analysis. In vivo xenografts generated from AZGP1 under- or over-expressing prostate cancer cells were used to determine the role of AZGP1 in prostate cancer tumor growth, and subsequent proteomics analysis was conducted to elucidate the mechanisms of AZGP1 action in prostate cancer progression. AZGP1 expression and microvessel density were measured in human prostate cancer samples on a tissue microarray of 215 independent patient samples. RESULT: Neither the knockout nor overexpression of AZGP1 exhibited significant effects on prostate cancer cell proliferation, clonal growth, migration, or invasion in vitro. The prostates of AZGP1-/- mice initially appeared to have grossly normal morphology; however, we observed fibrosis in the periglandular stroma and higher blood vessel density in the mouse prostate by 6 months. In PC3 and DU145 mouse xenografts, over-expression of AZGP1 did not affect tumor growth. Instead, these tumors displayed decreased microvessel density compared to xenografts derived from PC3 and DU145 control cells, suggesting that AZGP1 functions to inhibit angiogenesis in prostate cancer. Proteomics profiling further indicated that, compared to control xenografts, AZGP1 overexpressing PC3 xenografts are enriched with angiogenesis pathway proteins, including YWHAZ, EPHA2, SERPINE1, and PDCD6, MMP9, GPX1, HSPB1, COL18A1, RNH1, and ANXA1. In vitro functional studies show that AZGP1 inhibits human umbilical vein endothelial cell proliferation, migration, tubular formation and branching. Additionally, tumor microarray analysis shows that AZGP1 expression is negatively correlated with blood vessel density in human prostate cancer tissues. CONCLUSION: AZGP1 is a negative regulator of angiogenesis, such that loss of AZGP1 promotes angiogenesis in prostate cancer. AZGP1 likely exerts heterotypical effects on cells in the tumor microenvironment, such as stromal and endothelial cells. This study sheds light on the anti-angiogenic characteristics of AZGP1 in the prostate and provides a rationale to target AZGP1 to inhibit prostate cancer progression.

Published
2024

3. AZGP1 deficiency promotes angiogenesis in prostate cancer

Author

Wen, Ru M., Qiu, Zhengyuan, Marti, G. Edward W., Peterson, Eric E., Marques, Fernando Jose Garcia, Bermudez, Abel, Wei, Yi, Nolley, Rosalie, Lam, Nathan, Polasko, Alex LaPat, Chiu, Chun-Lung, Zhang, Dalin, Cho, Sanghee, Karageorgos, Grigorios Marios, McDonough, Elizabeth, Chadwick, Chrystal, Ginty, Fiona, Jung, Kyeong Joo, Machiraju, Raghu, Mallick, Parag, Crowley, Laura, Pollack, Jonathan R., Zhao, Hongjuan, Pitteri, Sharon J., and Brooks, James D.

Published
2024
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4. Study of the threshold anomaly in the elastic scattering of d+$^{197}$Au

Author

Giudice, T., Abriola, D., Arazi, A., de Barbará, E., Cardona, M. A., Gómez, J., Hojman, D., Betan, R. M. Id, Kohen, M. S., Llaneza, N., Martí, G. V., Paes, B., Schneider, D., Soler, H., and Lubian, J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Measurements of the elastic scattering angular distribution for the d+$^{197}$Au system were carried out covering deuteron incident energies in the range from 5 to 16 MeV, i.e. approximately 50% below and above the Coulomb barrier. A critical interaction distance of $d_I$= 2.49 fm was determined from these distributions, which is comparable to that of the radioactive halo nucleus $^{6}$He. The experimental angular distributions were systematically analyzed using two alternative models: the semi-microscopic Sao Paulo and the effective Woods-Saxon optical potentials, for which the best-fitting parameters were determined. These potentials, integrated in the vicinity of the sensitivity radius, were calculated for each energy. For both models, the energy dependence of these integrals presented the breakup threshold anomaly around the coulomb barrier, a typical signature of weakly bound nuclei., Comment: 20 pages. 7 figures. 60 References

Published
2023
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6. Centenarians Today: New Insights on Selection from the 5-COOP Study

Author

Jean-Marie Robine, Siu Lan Karen Cheung, Yasuhiko Saito, Bernard Jeune, Marti G. Parker, and François R. Herrmann

Subjects
Geriatrics, RC952-954.6
Abstract

The number of oldest old grew tremendously over the past few decades. However, recent studies have disclosed that the pace of increase strongly varies among countries. The present study aims to specify the level of mortality selection among the nonagenarians and centenarians living currently in five low mortality countries, Denmark, France, Japan, Switzerland, and Sweden, part of the 5-Country Oldest Old Project (5-COOP). All data come from the Human Mortality Database, except for the number of centenarians living in Japan. We disclosed three levels of mortality selection, a milder level in Japan, a stronger level in Denmark and Sweden and an intermediary level in France and Switzerland. These divergences offer an opportunity to study the existence of a trade-off between the level of mortality selection and the functional health status of the oldest old survivors which will be seized by the 5-COOP project.

Published
2010
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8. Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons

Author

Kennedy, Colin J., Oelker, Eric, Robinson, John M., Bothwell, Tobias, Kedar, Dhruv, Milner, William R., Marti, G. Edward, Derevianko, Andrei, and Ye, Jun

Subjects
Physics - Atomic Physics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Phenomenology, Physics - Optics
Abstract

We conduct frequency comparisons between a state-of-the-art strontium optical lattice clock, a cryogenic crystalline silicon cavity, and a hydrogen maser to set new bounds on the coupling of ultralight dark matter to Standard Model particles and fields in the mass range of $10^{-16}$ $-$ $10^{-21}$ eV. The key advantage of this two-part ratio comparison is the differential sensitivities to time variation of both the fine-structure constant and the electron mass, achieving a substantially improved limit on the moduli of ultralight dark matter, particularly at higher masses than typical atomic spectroscopic results. Furthermore, we demonstrate an extension of the search range to even higher masses by use of dynamical decoupling techniques. These results highlight the importance of using the best performing atomic clocks for fundamental physics applications as all-optical timescales are increasingly integrated with, and will eventually supplant, existing microwave timescales., Comment: 11 pages, 10 figures

Published
2020
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9. Energy dependence of the optical potential of the weakly bound 9Be projectile on the 197Au target

Author

Gollana, F., Abriola, D., Arazia, A., Cardonaa, M. A., de Barbara, E., Hojmana, D., Betan, R. M. Id, Marti, G. V., Pacheco, A. J., Rodriguesa, D., and Togneri, M.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

In this work we measured elastic and inelastic angular distributions of the weakly bound 9Be projectile on the 197Au target at several bombarding energies from 84% up to 140% of the Coulomb barrier. The elastic angular distributions were analyzed using a phenomenological Woods-Saxon potential and a double folding Sao Paulo potential and the energy dependence was extracted. Angular distributions from two inelastic peaks were compared with coupled channel calculations using reduced transition probabilities available in the literature. The energy dependence of the two interaction potential models show a similar trend in the region of the Coulomb barrier. Dispersion relation calculation demonstrates the presence of the breakup threshold anomaly proposed for weakly bound systems., Comment: 12 pages, 6 figures, 55 references

Published
2020
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10. Engineering Quantum States of Matter for Atomic Clocks in Shallow Optical Lattices

Author

Hutson, Ross B., Goban, Akihisa, Marti, G. Edward, Sonderhouse, Lindsay, Sanner, Christian, and Ye, Jun

Subjects
Physics - Atomic Physics, Condensed Matter - Quantum Gases
Abstract

We investigate the effects of stimulated scattering of optical lattice photons on atomic coherence times in a state-of-the art ${}^{87}\mathrm{Sr}$ optical lattice clock. Such scattering processes are found to limit the achievable coherence times to less than 12 s (corresponding to a quality factor of $1 \times 10^{16}$), significantly shorter than the predicted 145(40) s lifetime of ${}^{87}\mathrm{Sr}$'s excited clock state. We suggest that shallow, state-independent optical lattices with increased lattice constants can give rise to sufficiently small lattice photon scattering and motional dephasing rates as to enable coherence times on the order of the clock transition's natural lifetime. Not only should this scheme be compatible with the relatively high atomic density associated with Fermi-degenerate gases in three-dimensional optical lattices, but we anticipate that certain properties of various quantum states of matter can be used to suppress dephasing due to tunneling.

Published
2019
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11. Optical clock intercomparison with $6\times 10^{-19}$ precision in one hour

Author

Oelker, E., Hutson, R. B., Kennedy, C. J., Sonderhouse, L., Bothwell, T., Goban, A., Kedar, D., Sanner, C., Robinson, J. M., Marti, G. E., Matei, D. G., Legero, T., Giunta, M., Holzwarth, R., Riehle, F., Sterr, U., and Ye, J.

Subjects
Physics - Atomic Physics, Quantum Physics
Abstract

Improvements in atom-light coherence are foundational to progress in quantum information science, quantum optics, and precision metrology. Optical atomic clocks require local oscillators with exceptional optical coherence due to the challenge of performing spectroscopy on their ultra-narrow linewidth clock transitions. Advances in laser stabilization have thus enabled rapid progress in clock precision. A new class of ultrastable lasers based on cryogenic silicon reference cavities has recently demonstrated the longest optical coherence times to date. In this work we utilize such a local oscillator, along with a state-of-the-art frequency comb for coherence transfer, with two Sr optical lattice clocks to achieve an unprecedented level of clock stability. Through an anti-synchronous comparison, the fractional instability of both clocks is assessed to be $4.8\times 10^{-17}/\sqrt{\tau}$ for an averaging time $\tau$ in seconds. Synchronous interrogation reveals a quantum projection noise dominated instability of $3.5(2)\times10^{-17}/\sqrt{\tau}$, resulting in a precision of $5.8(3)\times 10^{-19}$ after a single hour of averaging. The ability to measure sub-$10^{-18}$ level frequency shifts in such short timescales will impact a wide range of applications for clocks in quantum sensing and fundamental physics. For example, this precision allows one to resolve the gravitational red shift from a 1 cm elevation change in only 20 minutes.

Published
2019
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13. $^9$Be+$^{120}$Sn scattering at near-barrier energies within a four body model

Author

Arazi, A., Casal, J., Rodríguez-Gallardo, M., Arias, J. M., Filho, R. Lichtenthäler, Abriola, D., Capurro, O. A., Cardona, M. A., Carnelli, P. F. F., de Barbará, E., Niello, J. Fernández, Figueira, J. M., Fimiani, L., Hojman, D., Martí, G. V., Heimman, D. Martínez, and Pacheco, A. J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Cross sections for elastic and inelastic scattering of the weakly-bound $^9$Be nucleus on a $^{120}$Sn target have been measured at seven bombarding energies around and above the Coulomb barrier. The elastic angular distributions are analyzed with a four-body continuum-discretized coupled-channels (CDCC) calculation, which considers $^9$Be as a three-body projectile ($\alpha$ + $\alpha$ + n). An optical model analysis using the S\~ao Paulo potential is also shown for comparison. The CDCC analysis shows that the coupling to the continuum part of the spectrum is important for the agreement with experimental data even at energies around the Coulomb barrier, suggesting that breakup is an important process at low energies. At the highest incident energies, two inelastic peaks are observed at 1.19(5) and 2.41(5) MeV. Coupled-channels (CC) calculations using a rotational model confirm that the first inelastic peak corresponds to the excitation of the 2$_1^+$ state in $^{120}$Sn, while the second one likely corresponds to the excitation of the 3$_1^-$ state., Comment: 11 pages, 9 figures. Accepted as PRC

Published
2018
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14. Emergence of multi-body interactions in few-atom sites of a fermionic lattice clock

Author

Goban, A., Hutson, R. B., Marti, G. E., Campbell, S. L., Perlin, M. A., Julienne, P. S., D'Incao, J. P., Rey, A. M., and Ye, J.

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics, Quantum Physics
Abstract

Alkaline-earth (AE) atoms have metastable clock states with minute-long optical lifetimes, high-spin nuclei, and SU($N$)-symmetric interactions that uniquely position them for advancing atomic clocks, quantum information processing, and quantum simulation. The interplay of precision measurement and quantum many-body physics is beginning to foster an exciting scientific frontier with many opportunities. Few particle systems provide a window to view the emergence of complex many-body phenomena arising from pairwise interactions. Here, we create arrays of isolated few-body systems in a fermionic ${}^{87}$Sr three-dimensional (3D) optical lattice clock and use high resolution clock spectroscopy to directly observe the onset of both elastic and inelastic multi-body interactions. These interactions cannot be broken down into sums over the underlying pairwise interactions. We measure particle-number-dependent frequency shifts of the clock transition for atom numbers $n$ ranging from 1 to 5, and observe nonlinear interaction shifts, which are characteristic of SU($N$)-symmetric elastic multi-body effects. To study inelastic multi-body effects, we use these frequency shifts to isolate $n$-occupied sites and measure the corresponding lifetimes. This allows us to access the short-range few-body physics free from systematic effects encountered in a bulk gas. These measurements, combined with theory, elucidate an emergence of multi-body effects in few-body systems of sites populated with ground-state atoms and those with single electronic excitations. By connecting these few-body systems through tunneling, the favorable energy and timescales of the interactions will allow our system to be utilized for studies of high-spin quantum magnetism and the Kondo effect., Comment: 9 pages, 5 figures

Published
2018
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18. Frequency measurements of superradiance from the strontium clock transition

Author

Norcia, Matthew A., Cline, Julia R. K., Muniz, Juan A., Robinson, John M., Hutson, Ross B., Goban, Akihisa, Marti, G. Edward, Ye, Jun, and Thompson, James K.

Subjects
Physics - Atomic Physics, Physics - Optics
Abstract

We present the first characterization of the spectral properties of superradiant light emitted from the ultra-narrow, 1 mHz linewidth optical clock transition in an ensemble of cold $^{87}$Sr atoms. Such a light source has been proposed as a next-generation active atomic frequency reference, with the potential to enable high-precision optical frequency references to be used outside laboratory environments. By comparing the frequency of our superradiant source to that of a state-of-the-art cavity-stabilized laser and optical lattice clock, we observe a fractional Allan deviation of $6.7(1)\times 10^{-16}$ at 1 second of averaging, establish absolute accuracy at the 2 Hz ($4\times 10^{-15}$ fractional frequency) level, and demonstrate insensitivity to key environmental perturbations., Comment: 7 pages, 4 figures

Published
2017
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19. Imaging optical frequencies with 100 $\mu$Hz precision and 1.1 $\mu$m resolution

Author

Marti, G. Edward, Hutson, Ross B., Goban, Akihisa, Campbell, Sara L., Poli, Nicola, and Ye, Jun

Subjects
Physics - Atomic Physics, Condensed Matter - Quantum Gases, Quantum Physics
Abstract

We implement imaging spectroscopy of the optical clock transition of lattice-trapped degenerate fermionic Sr in the Mott-insulating regime, combining micron spatial resolution with submillihertz spectral precision. We use these tools to demonstrate atomic coherence for up to 15 s on the clock transition and reach a record frequency precision of $2.5\times 10^{-19}$. We perform the most rapid evaluation of trapping light shifts and record a 150 mHz linewidth, the narrowest Rabi line shape observed on a coherent optical transition. The important emerging capability of combining high-resolution imaging and spectroscopy will improve the clock precision, and provide a path towards measuring many-body interactions and testing fundamental physics., Comment: 5 pages, plus 3 page supplemental material

Published
2017
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20. A Fermi-degenerate three-dimensional optical lattice clock

Author

Campbell, S. L., Hutson, R. B., Marti, G. E., Goban, A., Oppong, N. Darkwah, McNally, R. L., Sonderhouse, L., Robinson, J. M., Zhang, W., Bloom, B. J., and Ye, J.

Subjects
Physics - Atomic Physics, Condensed Matter - Quantum Gases, Quantum Physics
Abstract

Strontium optical lattice clocks have the potential to simultaneously interrogate millions of atoms with a high spectroscopic quality factor of $4 \times 10^{-17}$. Previously, atomic interactions have forced a compromise between clock stability, which benefits from a large atom number, and accuracy, which suffers from density-dependent frequency shifts. Here, we demonstrate a scalable solution which takes advantage of the high, correlated density of a degenerate Fermi gas in a three-dimensional optical lattice to guard against on-site interaction shifts. We show that contact interactions are resolved so that their contribution to clock shifts is orders of magnitude lower than in previous experiments. A synchronous clock comparison between two regions of the 3D lattice yields a $5 \times 10^{-19}$ measurement precision in 1 hour of averaging time., Comment: 19 pages, 4 figures; Supplementary Materials

Published
2017
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22. Nonstandard Errors

Author

MENKVELD, ALBERT J., primary, DREBER, ANNA, additional, HOLZMEISTER, FELIX, additional, HUBER, JUERGEN, additional, JOHANNESSON, MAGNUS, additional, KIRCHLER, MICHAEL, additional, NEUSÜß, SEBASTIAN, additional, RAZEN, MICHAEL, additional, WEITZEL, UTZ, additional, ABAD‐DÍAZ, DAVID, additional, ABUDY, MENACHEM (MENI), additional, ADRIAN, TOBIAS, additional, AIT‐SAHALIA, YACINE, additional, AKMANSOY, OLIVIER, additional, ALCOCK, JAMIE T., additional, ALEXEEV, VITALI, additional, ALOOSH, ARASH, additional, AMATO, LIVIA, additional, AMAYA, DIEGO, additional, ANGEL, JAMES J., additional, AVETIKIAN, ALEJANDRO T., additional, BACH, AMADEUS, additional, BAIDOO, EDWIN, additional, BAKALLI, GAETAN, additional, BAO, LI, additional, BARBON, ANDREA, additional, BASHCHENKO, OKSANA, additional, BINDRA, PARAMPREET C., additional, BJØNNES, GEIR H., additional, BLACK, JEFFREY R., additional, BLACK, BERNARD S., additional, BOGOEV, DIMITAR, additional, CORREA, SANTIAGO BOHORQUEZ, additional, BONDARENKO, OLEG, additional, BOS, CHARLES S., additional, BOSCH‐ROSA, CIRIL, additional, BOURI, ELIE, additional, BROWNLEES, CHRISTIAN, additional, CALAMIA, ANNA, additional, CAO, VIET NGA, additional, CAPELLE‐BLANCARD, GUNTHER, additional, ROMERO, LAURA M. CAPERA, additional, CAPORIN, MASSIMILIANO, additional, CARRION, ALLEN, additional, CASKURLU, TOLGA, additional, CHAKRABARTY, BIDISHA, additional, CHEN, JIAN, additional, CHERNOV, MIKHAIL, additional, CHEUNG, WILLIAM, additional, CHINCARINI, LUDWIG B., additional, CHORDIA, TARUN, additional, CHOW, SHEUNG‐CHI, additional, CLAPHAM, BENJAMIN, additional, COLLIARD, JEAN‐EDOUARD, additional, COMERTON‐FORDE, CAROLE, additional, CURRAN, EDWARD, additional, DAO, THONG, additional, DARE, WALE, additional, DAVIES, RYAN J., additional, BLASIS, RICCARDO DE, additional, NARD, GIANLUCA F. DE, additional, DECLERCK, FANY, additional, DEEV, OLEG, additional, DEGRYSE, HANS, additional, DEKU, SOLOMON Y., additional, DESAGRE, CHRISTOPHE, additional, DIJK, MATHIJS A. VAN, additional, DIM, CHUKWUMA, additional, DIMPFL, THOMAS, additional, DONG, YUN JIANG, additional, DRUMMOND, PHILIP A., additional, DUDDA, TOM, additional, DUEVSKI, TEODOR, additional, DUMITRESCU, ARIADNA, additional, DYAKOV, TEODOR, additional, DYHRBERG, ANNE HAUBO, additional, DZIELIŃSKI, MICHAŁ, additional, EKSI, ASLI, additional, KALAK, IZIDIN EL, additional, ELLEN, SASKIA TER, additional, EUGSTER, NICOLAS, additional, EVANS, MARTIN D. D., additional, FARRELL, MICHAEL, additional, FELEZ‐VINAS, ESTER, additional, FERRARA, GERARDO, additional, FERROUHI, EL MEHDI, additional, FLORI, ANDREA, additional, FLUHARTY‐JAIDEE, JONATHAN T., additional, FOLEY, SEAN D. V., additional, FONG, KINGSLEY Y. L., additional, FOUCAULT, THIERRY, additional, FRANUS, TATIANA, additional, FRANZONI, FRANCESCO, additional, FRIJNS, BART, additional, FRÖMMEL, MICHAEL, additional, FU, SERVANNA M., additional, FÜLLBRUNN, SASCHA C., additional, GAN, BAOQING, additional, GAO, GE, additional, GEHRIG, THOMAS P., additional, GEMAYEL, ROLAND, additional, GERRITSEN, DIRK, additional, GIL‐BAZO, JAVIER, additional, GILDER, DUDLEY, additional, GLOSTEN, LAWRENCE R., additional, GOMEZ, THOMAS, additional, GORBENKO, ARSENY, additional, GRAMMIG, JOACHIM, additional, GRÉGOIRE, VINCENT, additional, GÜÇBILMEZ, UFUK, additional, HAGSTRÖMER, BJÖRN, additional, HAMBUCKERS, JULIEN, additional, HAPNES, ERIK, additional, HARRIS, JEFFREY H., additional, HARRIS, LAWRENCE, additional, HARTMANN, SIMON, additional, HASSE, JEAN‐BAPTISTE, additional, HAUTSCH, NIKOLAUS, additional, HE, XUE‐ZHONG (TONY), additional, HEATH, DAVIDSON, additional, HEDIGER, SIMON, additional, HENDERSHOTT, TERRENCE, additional, HIBBERT, ANN MARIE, additional, HJALMARSSON, ERIK, additional, HOELSCHER, SETH A., additional, HOFFMANN, PETER, additional, HOLDEN, CRAIG W., additional, HORENSTEIN, ALEX R., additional, HUANG, WENQIAN, additional, HUANG, DA, additional, HURLIN, CHRISTOPHE, additional, ILCZUK, KONRAD, additional, IVASHCHENKO, ALEXEY, additional, IYER, SUBRAMANIAN R., additional, JAHANSHAHLOO, HOSSEIN, additional, JALKH, NAJI, additional, JONES, CHARLES M., additional, JURKATIS, SIMON, additional, JYLHÄ, PETRI, additional, KAECK, ANDREAS T., additional, KAISER, GABRIEL, additional, KARAM, ARZÉ, additional, KARMAZIENE, EGLE, additional, KASSNER, BERNHARD, additional, KAUSTIA, MARKKU, additional, KAZAK, EKATERINA, additional, KEARNEY, FEARGHAL, additional, KERVEL, VINCENT VAN, additional, KHAN, SAAD A., additional, KHOMYN, MARTA K., additional, KLEIN, TONY, additional, KLEIN, OLGA, additional, KLOS, ALEXANDER, additional, KOETTER, MICHAEL, additional, KOLOKOLOV, ALEKSEY, additional, KORAJCZYK, ROBERT A., additional, KOZHAN, ROMAN, additional, KRAHNEN, JAN P., additional, KUHLE, PAUL, additional, KWAN, AMY, additional, LAJAUNIE, QUENTIN, additional, LAM, F. Y. ERIC C., additional, LAMBERT, MARIE, additional, LANGLOIS, HUGUES, additional, LAUSEN, JENS, additional, LAUTER, TOBIAS, additional, LEIPPOLD, MARKUS, additional, LEVIN, VLADIMIR, additional, LI, YIJIE, additional, LI, HUI, additional, LIEW, CHEE YOONG, additional, LINDNER, THOMAS, additional, LINTON, OLIVER, additional, LIU, JIACHENG, additional, LIU, ANQI, additional, LLORENTE, GUILLERMO, additional, LOF, MATTHIJS, additional, LOHR, ARIEL, additional, LONGSTAFF, FRANCIS, additional, LOPEZ‐LIRA, ALEJANDRO, additional, MANKAD, SHAWN, additional, MANO, NICOLA, additional, MARCHAL, ALEXIS, additional, MARTINEAU, CHARLES, additional, MAZZOLA, FRANCESCO, additional, MELOSO, DEBRAH, additional, MI, MICHAEL G., additional, MIHET, ROXANA, additional, MOHAN, VIJAY, additional, MOINAS, SOPHIE, additional, MOORE, DAVID, additional, MU, LIANGYI, additional, MURAVYEV, DMITRIY, additional, MURPHY, DERMOT, additional, NESZVEDA, GABOR, additional, NEUMEIER, CHRISTIAN, additional, NIELSSON, ULF, additional, NIMALENDRAN, MAHENDRARAJAH, additional, NOLTE, SVEN, additional, NORDEN, LARS L., additional, O'NEILL, PETER, additional, OBAID, KHALED, additional, ØDEGAARD, BERNT A., additional, ÖSTBERG, PER, additional, PAGNOTTA, EMILIANO, additional, PAINTER, MARCUS, additional, PALAN, STEFAN, additional, PALIT, IMON J., additional, PARK, ANDREAS, additional, PASCUAL, ROBERTO, additional, PASQUARIELLO, PAOLO, additional, PASTOR, LUBOS, additional, PATEL, VINAY, additional, PATTON, ANDREW J., additional, PEARSON, NEIL D., additional, PELIZZON, LORIANA, additional, PELLI, MICHELE, additional, PELSTER, MATTHIAS, additional, PÉRIGNON, CHRISTOPHE, additional, PFIFFER, CAMERON, additional, PHILIP, RICHARD, additional, PLÍHAL, TOMÁŠ, additional, PRAKASH, PUNEET, additional, PRESS, OLIVER‐ALEXANDER, additional, PRODROMOU, TINA, additional, PROKOPCZUK, MARCEL, additional, PUTNINS, TALIS, additional, QIAN, YA, additional, RAIZADA, GAURAV, additional, RAKOWSKI, DAVID, additional, RANALDO, ANGELO, additional, REGIS, LUCA, additional, REITZ, STEFAN, additional, RENAULT, THOMAS, additional, RENJIE, REX W., additional, RENO, ROBERTO, additional, RIDDIOUGH, STEVEN J., additional, RINNE, KALLE, additional, RINTAMÄKI, PAUL, additional, RIORDAN, RYAN, additional, RITTMANNSBERGER, THOMAS, additional, LONGARELA, IÑAKI RODRÍGUEZ, additional, ROESCH, DOMINIK, additional, ROGNONE, LAVINIA, additional, ROSEMAN, BRIAN, additional, ROŞU, IOANID, additional, ROY, SAURABH, additional, RUDOLF, NICOLAS, additional, RUSH, STEPHEN R., additional, RZAYEV, KHALADDIN, additional, RZEŹNIK, ALEKSANDRA A., additional, SANFORD, ANTHONY, additional, SANKARAN, HARIKUMAR, additional, SARKAR, ASANI, additional, SARNO, LUCIO, additional, SCAILLET, OLIVIER, additional, SCHARNOWSKI, STEFAN, additional, SCHENK‐HOPPÉ, KLAUS R., additional, SCHERTLER, ANDREA, additional, SCHNEIDER, MICHAEL, additional, SCHROEDER, FLORIAN, additional, SCHÜRHOFF, NORMAN, additional, SCHUSTER, PHILIPP, additional, SCHWARZ, MARCO A., additional, SEASHOLES, MARK S., additional, SEEGER, NORMAN J., additional, SHACHAR, OR, additional, SHKILKO, ANDRIY, additional, SHUI, JESSICA, additional, SIKIC, MARIO, additional, SIMION, GIORGIA, additional, SMALES, LEE A., additional, SÖDERLIND, PAUL, additional, SOJLI, ELVIRA, additional, SOKOLOV, KONSTANTIN, additional, SÖNKSEN, JANTJE, additional, SPOKEVICIUTE, LAIMA, additional, STEFANOVA, DENITSA, additional, SUBRAHMANYAM, MARTI G., additional, SZASZI, BARNABAS, additional, TALAVERA, OLEKSANDR, additional, TANG, YUEHUA, additional, TAYLOR, NICK, additional, THAM, WING WAH, additional, THEISSEN, ERIK, additional, THIMME, JULIAN, additional, TONKS, IAN, additional, TRAN, HAI, additional, TRAPIN, LUCA, additional, TROLLE, ANDERS B., additional, VADUVA, M. ANDREEA, additional, VALENTE, GIORGIO, additional, NESS, ROBERT A. VAN, additional, VASQUEZ, AURELIO, additional, VEROUSIS, THANOS, additional, VERWIJMEREN, PATRICK, additional, VILHELMSSON, ANDERS, additional, VILKOV, GRIGORY, additional, VLADIMIROV, VLADIMIR, additional, VOGEL, SEBASTIAN, additional, VOIGT, STEFAN, additional, WAGNER, WOLF, additional, WALTHER, THOMAS, additional, WEISS, PATRICK, additional, WEL, MICHEL VAN DER, additional, WERNER, INGRID M., additional, WESTERHOLM, P. JOAKIM, additional, WESTHEIDE, CHRISTIAN, additional, WIKA, HANS C., additional, WIPPLINGER, EVERT, additional, WOLF, MICHAEL, additional, WOLFF, CHRISTIAN C. P., additional, WOLK, LEONARD, additional, WONG, WING‐KEUNG, additional, WRAMPELMEYER, JAN, additional, WU, ZHEN‐XING, additional, XIA, SHUO, additional, XIU, DACHENG, additional, XU, KE, additional, XU, CAIHONG, additional, YADAV, PRADEEP K., additional, YAGÜE, JOSÉ, additional, YAN, CHENG, additional, YANG, ANTTI, additional, YOO, WOONGSUN, additional, YU, WENJIA, additional, YU, YIHE, additional, YU, SHIHAO, additional, YUESHEN, BART Z., additional, YUFEROVA, DARYA, additional, ZAMOJSKI, MARCIN, additional, ZAREEI, ABALFAZL, additional, ZEISBERGER, STEFAN M., additional, ZHANG, LU, additional, ZHANG, S. SARAH, additional, ZHANG, XIAOYU, additional, ZHAO, LU, additional, ZHONG, ZHUO, additional, ZHOU, Z. IVY, additional, ZHOU, CHEN, additional, ZHU, XINGYU S., additional, ZOICAN, MARIUS, additional, and ZWINKELS, REMCO, additional

Published
2024
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23. Spin-orbit coupled fermions in an optical lattice clock

Author

Kolkowitz, S., Bromley, S. L., Bothwell, T., Wall, M. L., Marti, G. E., Koller, A. P., Zhang, X., Rey, A. M., and Ye, J.

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics, Quantum Physics
Abstract

Engineered spin-orbit coupling (SOC) in cold atom systems can aid in the study of novel synthetic materials and complex condensed matter phenomena. Despite great advances, alkali atom SOC systems are hindered by heating from spontaneous emission, which limits the observation of many-body effects, motivating research into potential alternatives. Here we demonstrate that SOC can be engineered to occur naturally in a one-dimensional fermionic 87Sr optical lattice clock (OLC). In contrast to previous SOC experiments, in this work the SOC is both generated and probed using a direct ultra-narrow optical clock transition between two electronic orbital states. We use clock spectroscopy to prepare lattice band populations, internal electronic states, and quasimomenta, as well as to produce SOC dynamics. The exceptionally long lifetime of the excited clock state (160 s) eliminates decoherence and atom loss from spontaneous emission at all relevant experimental timescales, allowing subsequent momentum- and spin-resolved in situ probing of the SOC band structure and eigenstates. We utilize these capabilities to study Bloch oscillations, spin-momentum locking, and Van Hove singularities in the transition density of states. Our results lay the groundwork for the use of OLCs to probe novel SOC phases of matter., Comment: 17 pages, 4 figures, and Methods section with 3 Extended Data figures. Reformatted from previous version, with reduced length and reduced number of citations to match journal format

Published
2016
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24. Verifying quantum superpositions at metre scales

Author

Stamper-Kurn, Dan M., Marti, G. Edward, and Müller, Holger

Subjects
Quantum Physics, Physics - Atomic Physics
Abstract

While the existence of quantum superpositions of massive particles over microscopic separations has been established since the birth of quantum mechanics, the maintenance of superposition states over macroscopic separations is a subject of modern experimental tests. In Ref. [1], T. Kovachy et al. report on applying optical pulses to place a freely falling Bose-Einstein condensate into a superposition of two trajectories that separate by an impressive distance of 54 cm before being redirected toward one another. When the trajectories overlap, a final optical pulse produces interference with high contrast, but with random phase, between the two wave packets. Contrary to claims made in Ref. [1], we argue that the observed interference is consistent with, but does not prove, that the spatially separated atomic ensembles were in a quantum superposition state. Therefore, the persistence of such superposition states remains experimentally unestablished., Comment: Comment on Kovachy et al., "Quantum superposition at the half-metre scale," Nature 528, 530 (2015); see also reply by Kovachy et al., arXiv:1607.03485

Published
2016
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25. Long-term outcomes of patients following hospitalization for coronavirus disease 2019: a prospective observational study

Author

Alguersuari, N., Arderiu, A., Baeza, N., Bugés, J., Cabello, J., Campillo, M., Cantos, J., Castellarnau, E., Coco, A., Coll, I., Coroleu, D., Costa, J., Demestre, X., Díez-Cascón, P., Elizari, M.J., Escape, I., Espaulella, N., Fabregat, J., Ferré, C., Ferrer, M., Franco, F., Galí, J., García, E., Garrillo, J., Guzmán, C., Iglesias, L., Invernón, L., Jimeno, J., Lima, J., León, M., Martí, G., Martínez, S., Martínez-Agea, J., Martínez-Fijo, L., Martínez-Montauti, J., Martínez-Trillos, A., Mechó, S., Méndez, A., Mendiola, B., Mercé, J., Miranda, F., Morillas, J., Montané, M., Musolas, A., Odriozola, A., Pagès, V., Palau, J., Palos, M.A., Parra, E., Pérez-Mas, J.R., Pizurno, K., Ponce, M., Pons, S., Redó, D., Rodón, N., Rodríguez-Froxán, G., Santamaría, A., Sitges, C., Stasi, N., Soler, J.M., Torrens, A., Vaqué, M., Ventura, L., Vericat, C., Vila, A., Meije, Yolanda, Duarte-Borges, Alejandra, Sanz, Xavier, Clemente, Mercedes, Ribera, Alba, Ortega, Lucía, González-Pérez, Ruth, Cid, Roser, Pareja, Júlia, Cantero, Irene, Ariño, Miquel, Sagués, Teresa, LLaberia, Jaume, Ayestarán, Ana, Fernández-Hidalgo, Nuria, and Candás-Estébanez, Beatriz

Published
2021
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26. Non-Standard Errors

Author

Menkveld, Albert J., Abudy, Menachem (Meni), Grammig, Joachim, Gregoire, Vincent, Hagströmer, Björn, Hambuckers, Julien, Hapnes, Erik, Harris, Jeffrey H., Harris, Lawrence, Hartmann, Simon, Hasse, Jean-Baptiste, Hautsch, Nikolaus, Adrian, Tobias, He, Xue-Zhong 'Tony', Heath, Davidson, Hediger, Simon, Hendershott, Terrence J., Hibbert, Ann Marie, Hjalmarsson, Erik, Hoelscher, Seth, Hoffmann, Peter, Holden, Craig W., Horenstein, Alex R., Ait-Sahalia, Yacine, Huang, Wenqian, Huang, Da, Hurlin, Christophe, Ivashchenko, Alexey, Iyer, Subramanian R., Jahanshahloo, Hossein, Jalkh, Naji, Jones, Charles M., Jurkatis, Simon, Jylha, Petri, Akmansoy, Olivier, Kaeck, Andreas, Kaiser, Gabriel, Karam, Arzé, Karmaziene, Egle, Kassner, Bernhard, Kaustia, Markku, Kazak, Ekaterina, Kearney, Fearghal, van Kervel, Vincent, Khan, Saad, Alcock, Jamie, Khomyn, Marta, Klein, Tony, Klein, Olga, Klos, Alexander, Koetter, Michael, Krahnen, Jan Pieter, Kolokolov, Aleksey, Korajczyk, Robert A., Kozhan, Roman, Kwan, Amy, Alexeev, Vitali, Lajaunie, Quentin, Lam, Full Yet Eric Campbell, Lambert, Marie, Langlois, Hugues, Lausen, Jens, Lauter, Tobias, Leippold, Markus, Levin, Vladimir, Li, Yijie, Li, (Michael) Hui, Aloosh, Arash, Liew, Chee Yoong, Lindner, Thomas, Linton, Oliver B., Liu, Jiacheng, Liu, Anqi, Llorente-Alvarez, Jesus-Guillermo, Lof, Matthijs, Lohr, Ariel, Longstaff, Francis A., Lopez-Lira, Alejandro, Amato, Livia, Mankad, Shawn, Mano, Nicola, Marchal, Alexis, Martineau, Charles, Mazzola, Francesco, Meloso, Debrah C, Mihet, Roxana, Mohan, Vijay, Moinas, Sophie, Moore, David, Amaya, Diego, Mu, Liangyi, Muravyev, Dmitriy, Murphy, Dermot, Neszveda, Gabor, Neumeier, Christian, Nielsson, Ulf, Nimalendran, Mahendrarajah, Nolte, Sven, Nordén, Lars L., O'Neill, Peter, Angel, James J., Obaid, Khaled, Ødegaard, Bernt Arne, Östberg, Per, Painter, Marcus, Palan, Stefan, Palit, Imon, Park, Andreas, Pascual Gascó, Roberto, Pasquariello, Paolo, Pastor, Lubos, Dreber, Anna, Bach, Amadeus, Patel, Vinay, Patton, Andrew J., Pearson, Neil D., Pelizzon, Loriana, Pelster, Matthias, Pérignon, Christophe, Pfiffer, Cameron, Philip, Richard, Plíhal, Tomáš, Prakash, Puneet, Baidoo, Edwin, Press, Oliver-Alexander, Prodromou, Tina, Putnins, Talis J., Raizada, Gaurav, Rakowski, David A., Ranaldo, Angelo, Regis, Luca, Reitz, Stefan, Renault, Thomas, Wang, Renjie, Bakalli, Gaetan, Renò, Roberto, Riddiough, Steven, Rinne, Kalle, Rintamäki, Paul, Riordan, Ryan, Rittmannsberger, Thomas, Rodríguez Longarela, Iñaki, Rösch, Dominik, Rognone, Lavinia, Roseman, Brian, Barbon, Andrea, Rosu, Ioanid, Roy, Saurabh, Rudolf, Nicolas, Rush, Stephen, Rzayev, Khaladdin, Rzeźnik, Aleksandra, Sanford, Anthony, Sankaran, Harikumar, Sarkar, Asani, Sarno, Lucio, Bashchenko, Oksana, Scaillet, Olivier, Scharnowski, Stefan, Schenk-Hoppé, Klaus Reiner, Schertler, Andrea, Schneider, Michael, Schroeder, Florian, Schürhoff, Norman, Schuster, Philipp, Schwarz, Marco A., Seasholes, Mark S., Bindra, Parampreet Christopher, Seeger, Norman, Shachar, Or, Shkilko, Andriy, Shui, Jessica, Sikic, Mario, Simion, Giorgia, Smales, Lee A., Söderlind, Paul, Sojli, Elvira, Sokolov, Konstantin, Bjonnes, Geir Hoidal, Spokeviciute, Laima, Stefanova, Denitsa, Subrahmanyam, Marti G., Neusüss, Sebastian, Szaszi, Barnabas, Talavera, Oleksandr, Tang, Yuehua, Taylor, Nicholas, Tham, Wing Wah, Theissen, Erik, Black, Jeffrey R., Thimme, Julian, Tonks, Ian, Tran, Hai, Trapin, Luca, Trolle, Anders B., Valente, Giorgio, Van Ness, Robert A., Vasquez, Aurelio, Verousis, Thanos, Verwijmeren, Patrick, Black, Bernard S., Vilhelmsson, Anders, Vilkov, Grigory, Vladimirov, Vladimir, Vogel, Sebastian, Voigt, Stefan, Wagner, Wolf, Walther, Thomas, Weiss, Patrick, van der Wel, Michel, Werner, Ingrid M., Bohorquez, Santiago, Westerholm, P. Joakim, Westheide, Christian, Wipplinger, Evert, Wolf, Michael, Wolff, Christian C. P., Wolk, Leonard, Wong, Wing-Keung, Wrampelmeyer, Jan, Xia, Shuo, Xiu, Dacheng, Holzmeister, Felix, Bondarenko, Oleg, Xu, Ke, Xu, Caihong, Yadav, Pradeep K., Yagüe, José, Yan, Cheng, Yang, Antti, Yoo, Woongsun, Yu, Wenjia, Yu, Shihao, Yueshen, Bart Zhou, Bos, Charles S., Yuferova, Darya, Zamojski, Marcin, Zareei, Abalfazl, Zeisberger, Stefan, Zhang, Lu, Zhang, Xiaoyu, Zhong, Zhuo, Zhou, Z. Ivy, Zhou, Chen, Zhu, Xingyu, Bosch-Rosa, Ciril, Zoican, Marius, Zwinkels, Remco C.J., Chen, Jian, Duevski, Teodor, Gao, Ge, Gemayel, Roland, Gilder, Dudley, Kuhle, Paul, Pagnotta, Emiliano, Pelli, Michele, Bouri, Elie, Sönksen, Jantje, Ilczuk, Konrad, Bogoev, Dimitar, Qian, Ya, Wika, Hans C., Yu, Yihe, Zhao, Lu, Mi, Michael, Bao, Li, Brownlees, Christian T., Vaduva, Andreea, Prokopczuk, Marcel, Avetikian, Alejandro, Wu, Zhen-Xing, Calamia, Anna, Cao, Viet Nga, Capelle-Blancard, Gunther, Capera, Laura, Caporin, Massimiliano, Huber, Juergen, Carrion, Allen, Caskurlu, Tolga, Chakrabarty, Bidisha, Chernov, Mikhail, Cheung, William Ming Yan, Chincarini, Ludwig B., Chordia, Tarun, Chow, Sheung Chi, Clapham, Benjamin, Colliard, Jean-Edouard, Johanneson, Magnus, Comerton-Forde, Carole, Curran, Edward, Dao, Thong, Dare, Wale, Davies, Ryan J., De Blasis, Riccardo, De Nard, Gianluca, Declerck, Fany, Deev, Oleg, Degryse, Hans, Kirchler, Michael, Deku, Solomon, Desagre, Christophe, Dim, Chukwuma, Dimpfl, Thomas, Dong, Yun Jiang, Drummond, Philip, Dudda, Tom, Dumitrescu, Ariadna, Dyakov, Teodor, Razen, Michael, Dyhrberg, Anne Haubo, Dzieliński, Michał, Eksi, Asli, El Kalak, Izidin, ter Ellen, Saskia, Eugster, Nicolas, Evans, Martin D.D., Farrell, Michael, Félez-Viñas, Ester, Ferrara, Gerardo, Weitzel, Utz, FERROUHI, El Mehdi, Flori, Andrea, Fluharty-Jaidee, Jonathan, Foley, Sean, Fong, Kingsley Y. L., Foucault, Thierry, Franus, Tatiana, Franzoni, Francesco A., Frijns, Bart, Frömmel, Michael, Abad, David, Fu, Servanna Mianjun, Füllbrunn, Sascha, Gan, Baoqing, Gehrig, Thomas, Gerritsen, Dirk, Gil-Bazo, Javier, Glosten, Lawrence R., Gomez, Thomas, Gorbenko, Arseny, Güçbilmez, Ufuk, Van Dijk, Matthijs A., Menkveld, Albert J., Abudy, Menachem (Meni), Grammig, Joachim, Gregoire, Vincent, Hagströmer, Björn, Hambuckers, Julien, Hapnes, Erik, Harris, Jeffrey H., Harris, Lawrence, Hartmann, Simon, Hasse, Jean-Baptiste, Hautsch, Nikolaus, Adrian, Tobias, He, Xue-Zhong 'Tony', Heath, Davidson, Hediger, Simon, Hendershott, Terrence J., Hibbert, Ann Marie, Hjalmarsson, Erik, Hoelscher, Seth, Hoffmann, Peter, Holden, Craig W., Horenstein, Alex R., Ait-Sahalia, Yacine, Huang, Wenqian, Huang, Da, Hurlin, Christophe, Ivashchenko, Alexey, Iyer, Subramanian R., Jahanshahloo, Hossein, Jalkh, Naji, Jones, Charles M., Jurkatis, Simon, Jylha, Petri, Akmansoy, Olivier, Kaeck, Andreas, Kaiser, Gabriel, Karam, Arzé, Karmaziene, Egle, Kassner, Bernhard, Kaustia, Markku, Kazak, Ekaterina, Kearney, Fearghal, van Kervel, Vincent, Khan, Saad, Alcock, Jamie, Khomyn, Marta, Klein, Tony, Klein, Olga, Klos, Alexander, Koetter, Michael, Krahnen, Jan Pieter, Kolokolov, Aleksey, Korajczyk, Robert A., Kozhan, Roman, Kwan, Amy, Alexeev, Vitali, Lajaunie, Quentin, Lam, Full Yet Eric Campbell, Lambert, Marie, Langlois, Hugues, Lausen, Jens, Lauter, Tobias, Leippold, Markus, Levin, Vladimir, Li, Yijie, Li, (Michael) Hui, Aloosh, Arash, Liew, Chee Yoong, Lindner, Thomas, Linton, Oliver B., Liu, Jiacheng, Liu, Anqi, Llorente-Alvarez, Jesus-Guillermo, Lof, Matthijs, Lohr, Ariel, Longstaff, Francis A., Lopez-Lira, Alejandro, Amato, Livia, Mankad, Shawn, Mano, Nicola, Marchal, Alexis, Martineau, Charles, Mazzola, Francesco, Meloso, Debrah C, Mihet, Roxana, Mohan, Vijay, Moinas, Sophie, Moore, David, Amaya, Diego, Mu, Liangyi, Muravyev, Dmitriy, Murphy, Dermot, Neszveda, Gabor, Neumeier, Christian, Nielsson, Ulf, Nimalendran, Mahendrarajah, Nolte, Sven, Nordén, Lars L., O'Neill, Peter, Angel, James J., Obaid, Khaled, Ødegaard, Bernt Arne, Östberg, Per, Painter, Marcus, Palan, Stefan, Palit, Imon, Park, Andreas, Pascual Gascó, Roberto, Pasquariello, Paolo, Pastor, Lubos, Dreber, Anna, Bach, Amadeus, Patel, Vinay, Patton, Andrew J., Pearson, Neil D., Pelizzon, Loriana, Pelster, Matthias, Pérignon, Christophe, Pfiffer, Cameron, Philip, Richard, Plíhal, Tomáš, Prakash, Puneet, Baidoo, Edwin, Press, Oliver-Alexander, Prodromou, Tina, Putnins, Talis J., Raizada, Gaurav, Rakowski, David A., Ranaldo, Angelo, Regis, Luca, Reitz, Stefan, Renault, Thomas, Wang, Renjie, Bakalli, Gaetan, Renò, Roberto, Riddiough, Steven, Rinne, Kalle, Rintamäki, Paul, Riordan, Ryan, Rittmannsberger, Thomas, Rodríguez Longarela, Iñaki, Rösch, Dominik, Rognone, Lavinia, Roseman, Brian, Barbon, Andrea, Rosu, Ioanid, Roy, Saurabh, Rudolf, Nicolas, Rush, Stephen, Rzayev, Khaladdin, Rzeźnik, Aleksandra, Sanford, Anthony, Sankaran, Harikumar, Sarkar, Asani, Sarno, Lucio, Bashchenko, Oksana, Scaillet, Olivier, Scharnowski, Stefan, Schenk-Hoppé, Klaus Reiner, Schertler, Andrea, Schneider, Michael, Schroeder, Florian, Schürhoff, Norman, Schuster, Philipp, Schwarz, Marco A., Seasholes, Mark S., Bindra, Parampreet Christopher, Seeger, Norman, Shachar, Or, Shkilko, Andriy, Shui, Jessica, Sikic, Mario, Simion, Giorgia, Smales, Lee A., Söderlind, Paul, Sojli, Elvira, Sokolov, Konstantin, Bjonnes, Geir Hoidal, Spokeviciute, Laima, Stefanova, Denitsa, Subrahmanyam, Marti G., Neusüss, Sebastian, Szaszi, Barnabas, Talavera, Oleksandr, Tang, Yuehua, Taylor, Nicholas, Tham, Wing Wah, Theissen, Erik, Black, Jeffrey R., Thimme, Julian, Tonks, Ian, Tran, Hai, Trapin, Luca, Trolle, Anders B., Valente, Giorgio, Van Ness, Robert A., Vasquez, Aurelio, Verousis, Thanos, Verwijmeren, Patrick, Black, Bernard S., Vilhelmsson, Anders, Vilkov, Grigory, Vladimirov, Vladimir, Vogel, Sebastian, Voigt, Stefan, Wagner, Wolf, Walther, Thomas, Weiss, Patrick, van der Wel, Michel, Werner, Ingrid M., Bohorquez, Santiago, Westerholm, P. Joakim, Westheide, Christian, Wipplinger, Evert, Wolf, Michael, Wolff, Christian C. P., Wolk, Leonard, Wong, Wing-Keung, Wrampelmeyer, Jan, Xia, Shuo, Xiu, Dacheng, Holzmeister, Felix, Bondarenko, Oleg, Xu, Ke, Xu, Caihong, Yadav, Pradeep K., Yagüe, José, Yan, Cheng, Yang, Antti, Yoo, Woongsun, Yu, Wenjia, Yu, Shihao, Yueshen, Bart Zhou, Bos, Charles S., Yuferova, Darya, Zamojski, Marcin, Zareei, Abalfazl, Zeisberger, Stefan, Zhang, Lu, Zhang, Xiaoyu, Zhong, Zhuo, Zhou, Z. Ivy, Zhou, Chen, Zhu, Xingyu, Bosch-Rosa, Ciril, Zoican, Marius, Zwinkels, Remco C.J., Chen, Jian, Duevski, Teodor, Gao, Ge, Gemayel, Roland, Gilder, Dudley, Kuhle, Paul, Pagnotta, Emiliano, Pelli, Michele, Bouri, Elie, Sönksen, Jantje, Ilczuk, Konrad, Bogoev, Dimitar, Qian, Ya, Wika, Hans C., Yu, Yihe, Zhao, Lu, Mi, Michael, Bao, Li, Brownlees, Christian T., Vaduva, Andreea, Prokopczuk, Marcel, Avetikian, Alejandro, Wu, Zhen-Xing, Calamia, Anna, Cao, Viet Nga, Capelle-Blancard, Gunther, Capera, Laura, Caporin, Massimiliano, Huber, Juergen, Carrion, Allen, Caskurlu, Tolga, Chakrabarty, Bidisha, Chernov, Mikhail, Cheung, William Ming Yan, Chincarini, Ludwig B., Chordia, Tarun, Chow, Sheung Chi, Clapham, Benjamin, Colliard, Jean-Edouard, Johanneson, Magnus, Comerton-Forde, Carole, Curran, Edward, Dao, Thong, Dare, Wale, Davies, Ryan J., De Blasis, Riccardo, De Nard, Gianluca, Declerck, Fany, Deev, Oleg, Degryse, Hans, Kirchler, Michael, Deku, Solomon, Desagre, Christophe, Dim, Chukwuma, Dimpfl, Thomas, Dong, Yun Jiang, Drummond, Philip, Dudda, Tom, Dumitrescu, Ariadna, Dyakov, Teodor, Razen, Michael, Dyhrberg, Anne Haubo, Dzieliński, Michał, Eksi, Asli, El Kalak, Izidin, ter Ellen, Saskia, Eugster, Nicolas, Evans, Martin D.D., Farrell, Michael, Félez-Viñas, Ester, Ferrara, Gerardo, Weitzel, Utz, FERROUHI, El Mehdi, Flori, Andrea, Fluharty-Jaidee, Jonathan, Foley, Sean, Fong, Kingsley Y. L., Foucault, Thierry, Franus, Tatiana, Franzoni, Francesco A., Frijns, Bart, Frömmel, Michael, Abad, David, Fu, Servanna Mianjun, Füllbrunn, Sascha, Gan, Baoqing, Gehrig, Thomas, Gerritsen, Dirk, Gil-Bazo, Javier, Glosten, Lawrence R., Gomez, Thomas, Gorbenko, Arseny, Güçbilmez, Ufuk, and Van Dijk, Matthijs A.

Abstract

In statistics, samples are drawn from a population in a data-generating process (DGP). Standard errors measure the uncertainty in estimates of population parameters. In science, evidence is generated to test hypotheses in an evidence-generating process (EGP). We claim that EGP variation across researchers adds uncertainty—nonstandard errors (NSEs). We study NSEs by letting 164 teams test the same hypotheses on the same data. NSEs turn out to be sizable, but smaller for more reproducible or higher rated research. Adding peer-review stages reduces NSEs. We further find that this type of uncertainty is underestimated by participants.

Published
2024

27. Nonstandard Errors

Author

Universidad de Alicante. Departamento de Economía Financiera y Contabilidad, Menkveld, Albert J., Dreber, Anna, Holzmeister, Felix, Huber, Juergen, Johannesson, Magnus, Kirchler, Michael, Neusüß, Sebastian, Razen, Michael, Weitzel, Utz, Abad, David, Abudy, Menachem (Meni), Adrian, Tobias, Ait-Sahalia, Yacine, Akmansoy, Olivier, Alcock, Jamie T., Alexeev, Vitali, Aloosh, Arash, Amato, Livia, Amaya, Diego, Angel, James J., Avetikian, Alejandro T., Bach, Amadeus, Baidoo, Edwin, Bakalli, Gaetan, Bao, Li, Barbon, Andrea, Bashchenko, Oksana, Bindra, Parampreet C., Bjønnes, Geir H., Black, Jeffrey R., Black, Bernard S., Bogoev, Dimitar, Bohorquez Correa, Santiago, Bondarenko, Oleg, Bos, Charles S., Bosch-Rosa, Ciril, Bouri, Elie, Brownlees, Christian, Calamia, Anna, Cao, Viet Nga, Capelle-Blancard, Gunther, Capera Romero, Laura M., Caporin, Massimiliano, Carrion, Allen, Caskurlu, Tolga, Chakrabarty, Bidisha, Chen, Jian, Chernov, Mikhail, Cheung, William, Chincarini, Ludwig B., Chordia, Tarun, Chow, Sheung-Chi, Clapham, Benjamin, Colliard, Jean-Edouard, Comerton-Forde, Carole, Curran, Edward, Dao, Thong, Dare, Wale, Davies, Ryan J., De Blasis, Riccardo, De Nard, Gianluca F., Declerck, Fany, Deev, Oleg, Degryse, Hans, Deku, Solomon Y., Desagre, Christophe, Van Dijk, Mathijs A., Dim, Chukwuma, Dimpfl, Thomas, Dong, Yun Jiang, Drummond, Philip A., Dudda, Tom, Duevski, Teodor, Dumitrescu, Ariadna, Dyakov, Teodor, Dyhrberg, Anne Haubo, Dzieliński, Michał, Eksi, Asli, El Kalak, Izidin, Ellen, Saskia Ter, Eugster, Nicolas, Evans, Martin D. D., Farrell, Michael, Felez-Vinas, Ester, Ferrara, Gerardo, Ferrouhi, El Mehdi, Flori, Andrea, Fluharty-Jaidee, Jonathan T., Foley, Sean D. V., Fong, Kingsley Y. L., Foucault, Thierry, Franus, Tatiana, Franzoni, Francesco, Frijns, Bart, Frömmel, Michael, Fu, Servanna M., Füllbrunn, Sascha C., Gan, Baoqing, Gao, Ge, Gehrig, Thomas P., Gemayel, Roland, Gerritsen, Dirk, Gil-Bazo, Javier, Gilder, Dudley, Glosten, Lawrence R., Gomez, Thomas, Gorbenko, Arseny, Grammig, Joachim, Grégoire, Vincent, Güçbilmez, Ufuk, Hagströmer, Björn, Hambuckers, Julien, Hapnes, Erik, Harris, Jeffrey H., Harris, Lawrence, Hartmann, Simon, Hasse, Jean-Baptiste, Hautsch, Nikolaus, He, Xue-Zhong (Tony), Heath, Davidson, Hediger, Simon, Hendershott, Terrence, Hibbert, Ann Marie, Hjalmarsson, Erik, Hoelscher, Seth A., Hoffmann, Peter, Holden, Craig W., Horenstein, Alex R., Huang, Wenqian, Huang, Da, Hurlin, Christophe, Ilczuk, Konrad, Ivashchenko, Alexey, Iyer, Subramanian R., Jahanshahloo, Hossein, Jalkh, Naji, Jones, Charles M., Jurkatis, Simon, Jylhä, Petri, Kaeck, Andreas T., Kaiser, Gabriel, Karam, Arzé, Karmaziene, Egle, Kassner, Bernhard, Kaustia, Markku, Kazak, Ekaterina, Kearney, Fearghal, Van Kervel, Vincent, Khan, Saad A., Khomyn, Marta K., Klein, Tony, Klein, Olga, Klos, Alexander, Koetter, Michael, Kolokolov, Aleksey, Korajczyk, Robert A., Kozhan, Roman, Krahnen, Jan P., Kuhle, Paul, Kwan, Amy, Lajaunie, Quentin, Lam, F. Y. Eric C., Lambert, Marie, Langlois, Hugues, Lausen, Jens, Lauter, Tobias, Leippold, Markus, Levin, Vladimir, Li, Yijie, Li, Hui, Liew, Chee Yoong, Lindner, Thomas, Linton, Oliver, Liu, Jiacheng, Liu, Anqi, Llorente, Guillermo, Lof, Matthijs, Lohr, Ariel, Longstaff, Francis, Lopez-Lira, Alejandro, Mankad, Shawn, Mano, Nicola, Marchal, Alexis, Martineau, Charles, Mazzola, Francesco, Meloso, Debrah, Mi, Michael G., Mihet, Roxana, Mohan, Vijay, Moinas, Sophie, Moore, David, Mu, Liangyi, Muravyev, Dmitriy, Murphy, Dermot, Neszveda, Gabor, Neumeier, Christian, Nielsson, Ulf, Nimalendran, Mahendrarajah, Nolte, Sven, Norden, Lars L., O'neill, Peter, Obaid, Khaled, Ødegaard, Bernt A., Östberg, Per, Pagnotta, Emiliano, Painter, Marcus, Palan, Stefan, Palit, Imon J., Park, Andreas, Pascual, Roberto, Pasquariello, Paolo, Pastor, Lubos, Patel, Vinay, Patton, Andrew J., Pearson, Neil D., Pelizzon, Loriana, Pelli, Michele, Pelster, Matthias, Pérignon, Christophe, Pfiffer, Cameron, Philip, Richard, Plíhal, Tomáš, Prakash, Puneet, Press, Oliver-Alexander, Prodromou, Tina, Prokopczuk, Marcel, Putnins, Talis, Qian, Ya, Raizada, Gaurav, Rakowski, David, Ranaldo, Angelo, Regis, Luca, Reitz, Stefan, Renault, Thomas, Renjie, Rex W., Reno, Roberto, Riddiough, Steven J., Rinne, Kalle, Rintamäki, Paul, Riordan, Ryan, Rittmannsberger, Thomas, Rodríguez Longarela, Iñaki, Roesch, Dominik, Rognone, Lavinia, Roseman, Brian, Roşu, Ioanid, Roy, Saurabh, Rudolf, Nicolas, Rush, Stephen R., Rzayev, Khaladdin, Rzeźnik, Aleksandra A., Sanford, Anthony, Sankaran, Harikumar, Sarkar, Asani, Sarno, Lucio, Scaillet, Olivier, Scharnowski, Stefan, Schenk-Hoppé, Klaus R., Schertler, Andrea, Schneider, Michael, Schroeder, Florian, Schürhoff, Norman, Schuster, Philipp, Schwarz, Marco A., Seasholes, Mark S., Seeger, Norman J., Shachar, Or, Shkilko, Andriy, Shui, Jessica, Sikic, Mario, Simion, Giorgia, Smales, Lee A., Söderlind, Paul, Sojli, Elvira, Sokolov, Konstantin, Sönksen, Jantje, Spokeviciute, Laima, Stefanova, Denitsa, Subrahmanyam, Marti G., Szaszi, Barnabas, Talavera, Oleksandr, Tang, Yuehua, Taylor, Nick, Tham, Wing Wah, Theissen, Erik, Thimme, Julian, Tonks, Ian, Tran, Hai, Trapin, Luca, Trolle, Anders B., Vaduva, M. Andreea, Valente, Giorgio, Van Ness, Robert A., Vasquez, Aurelio, Verousis, Thanos, Verwijmeren, Patrick, Vilhelmsson, Anders, Vilkov, Grigory, Vladimirov, Vladimir, Vogel, Sebastian, Voigt, Stefan, Wagner, Wolf, Walther, Thomas, Weiss, Patrick, Van Der Wel, Michel, Werner, Ingrid M., Westerholm, P. Joakim, Westheide, Christian, Wika, Hans C., Wipplinger, Evert, Wolf, Michael, Wolff, Christian C. P., Wolk, Leonard, Wong, Wing-Keung, Wrampelmeyer, Jan, Wu, Zhen-Xing, Xia, Shuo, Xiu, Dacheng, Xu, Ke, Xu, Caihong, Yadav, Pradeep K., Yagüe, José, Yan, Cheng, Yang, Antti, Yoo, Woongsun, Yu, Wenjia, Yu, Yihe, Yu, Shihao, Yueshen, Bart Z., Yuferova, Darya, Zamojski, Marcin, Zareei, Abalfazl, Zeisberger, Stefan M., Zhang, Lu, Zhang, S. Sarah, Zhang, Xiaoyu, Zhao, Lu, Zhong, Zhuo, Zhou, Z. Ivy, Zhou, Chen, Zhu, Xingyu S., Zoican, Marius, Zwinkels, Remco, Universidad de Alicante. Departamento de Economía Financiera y Contabilidad, Menkveld, Albert J., Dreber, Anna, Holzmeister, Felix, Huber, Juergen, Johannesson, Magnus, Kirchler, Michael, Neusüß, Sebastian, Razen, Michael, Weitzel, Utz, Abad, David, Abudy, Menachem (Meni), Adrian, Tobias, Ait-Sahalia, Yacine, Akmansoy, Olivier, Alcock, Jamie T., Alexeev, Vitali, Aloosh, Arash, Amato, Livia, Amaya, Diego, Angel, James J., Avetikian, Alejandro T., Bach, Amadeus, Baidoo, Edwin, Bakalli, Gaetan, Bao, Li, Barbon, Andrea, Bashchenko, Oksana, Bindra, Parampreet C., Bjønnes, Geir H., Black, Jeffrey R., Black, Bernard S., Bogoev, Dimitar, Bohorquez Correa, Santiago, Bondarenko, Oleg, Bos, Charles S., Bosch-Rosa, Ciril, Bouri, Elie, Brownlees, Christian, Calamia, Anna, Cao, Viet Nga, Capelle-Blancard, Gunther, Capera Romero, Laura M., Caporin, Massimiliano, Carrion, Allen, Caskurlu, Tolga, Chakrabarty, Bidisha, Chen, Jian, Chernov, Mikhail, Cheung, William, Chincarini, Ludwig B., Chordia, Tarun, Chow, Sheung-Chi, Clapham, Benjamin, Colliard, Jean-Edouard, Comerton-Forde, Carole, Curran, Edward, Dao, Thong, Dare, Wale, Davies, Ryan J., De Blasis, Riccardo, De Nard, Gianluca F., Declerck, Fany, Deev, Oleg, Degryse, Hans, Deku, Solomon Y., Desagre, Christophe, Van Dijk, Mathijs A., Dim, Chukwuma, Dimpfl, Thomas, Dong, Yun Jiang, Drummond, Philip A., Dudda, Tom, Duevski, Teodor, Dumitrescu, Ariadna, Dyakov, Teodor, Dyhrberg, Anne Haubo, Dzieliński, Michał, Eksi, Asli, El Kalak, Izidin, Ellen, Saskia Ter, Eugster, Nicolas, Evans, Martin D. D., Farrell, Michael, Felez-Vinas, Ester, Ferrara, Gerardo, Ferrouhi, El Mehdi, Flori, Andrea, Fluharty-Jaidee, Jonathan T., Foley, Sean D. V., Fong, Kingsley Y. L., Foucault, Thierry, Franus, Tatiana, Franzoni, Francesco, Frijns, Bart, Frömmel, Michael, Fu, Servanna M., Füllbrunn, Sascha C., Gan, Baoqing, Gao, Ge, Gehrig, Thomas P., Gemayel, Roland, Gerritsen, Dirk, Gil-Bazo, Javier, Gilder, Dudley, Glosten, Lawrence R., Gomez, Thomas, Gorbenko, Arseny, Grammig, Joachim, Grégoire, Vincent, Güçbilmez, Ufuk, Hagströmer, Björn, Hambuckers, Julien, Hapnes, Erik, Harris, Jeffrey H., Harris, Lawrence, Hartmann, Simon, Hasse, Jean-Baptiste, Hautsch, Nikolaus, He, Xue-Zhong (Tony), Heath, Davidson, Hediger, Simon, Hendershott, Terrence, Hibbert, Ann Marie, Hjalmarsson, Erik, Hoelscher, Seth A., Hoffmann, Peter, Holden, Craig W., Horenstein, Alex R., Huang, Wenqian, Huang, Da, Hurlin, Christophe, Ilczuk, Konrad, Ivashchenko, Alexey, Iyer, Subramanian R., Jahanshahloo, Hossein, Jalkh, Naji, Jones, Charles M., Jurkatis, Simon, Jylhä, Petri, Kaeck, Andreas T., Kaiser, Gabriel, Karam, Arzé, Karmaziene, Egle, Kassner, Bernhard, Kaustia, Markku, Kazak, Ekaterina, Kearney, Fearghal, Van Kervel, Vincent, Khan, Saad A., Khomyn, Marta K., Klein, Tony, Klein, Olga, Klos, Alexander, Koetter, Michael, Kolokolov, Aleksey, Korajczyk, Robert A., Kozhan, Roman, Krahnen, Jan P., Kuhle, Paul, Kwan, Amy, Lajaunie, Quentin, Lam, F. Y. Eric C., Lambert, Marie, Langlois, Hugues, Lausen, Jens, Lauter, Tobias, Leippold, Markus, Levin, Vladimir, Li, Yijie, Li, Hui, Liew, Chee Yoong, Lindner, Thomas, Linton, Oliver, Liu, Jiacheng, Liu, Anqi, Llorente, Guillermo, Lof, Matthijs, Lohr, Ariel, Longstaff, Francis, Lopez-Lira, Alejandro, Mankad, Shawn, Mano, Nicola, Marchal, Alexis, Martineau, Charles, Mazzola, Francesco, Meloso, Debrah, Mi, Michael G., Mihet, Roxana, Mohan, Vijay, Moinas, Sophie, Moore, David, Mu, Liangyi, Muravyev, Dmitriy, Murphy, Dermot, Neszveda, Gabor, Neumeier, Christian, Nielsson, Ulf, Nimalendran, Mahendrarajah, Nolte, Sven, Norden, Lars L., O'neill, Peter, Obaid, Khaled, Ødegaard, Bernt A., Östberg, Per, Pagnotta, Emiliano, Painter, Marcus, Palan, Stefan, Palit, Imon J., Park, Andreas, Pascual, Roberto, Pasquariello, Paolo, Pastor, Lubos, Patel, Vinay, Patton, Andrew J., Pearson, Neil D., Pelizzon, Loriana, Pelli, Michele, Pelster, Matthias, Pérignon, Christophe, Pfiffer, Cameron, Philip, Richard, Plíhal, Tomáš, Prakash, Puneet, Press, Oliver-Alexander, Prodromou, Tina, Prokopczuk, Marcel, Putnins, Talis, Qian, Ya, Raizada, Gaurav, Rakowski, David, Ranaldo, Angelo, Regis, Luca, Reitz, Stefan, Renault, Thomas, Renjie, Rex W., Reno, Roberto, Riddiough, Steven J., Rinne, Kalle, Rintamäki, Paul, Riordan, Ryan, Rittmannsberger, Thomas, Rodríguez Longarela, Iñaki, Roesch, Dominik, Rognone, Lavinia, Roseman, Brian, Roşu, Ioanid, Roy, Saurabh, Rudolf, Nicolas, Rush, Stephen R., Rzayev, Khaladdin, Rzeźnik, Aleksandra A., Sanford, Anthony, Sankaran, Harikumar, Sarkar, Asani, Sarno, Lucio, Scaillet, Olivier, Scharnowski, Stefan, Schenk-Hoppé, Klaus R., Schertler, Andrea, Schneider, Michael, Schroeder, Florian, Schürhoff, Norman, Schuster, Philipp, Schwarz, Marco A., Seasholes, Mark S., Seeger, Norman J., Shachar, Or, Shkilko, Andriy, Shui, Jessica, Sikic, Mario, Simion, Giorgia, Smales, Lee A., Söderlind, Paul, Sojli, Elvira, Sokolov, Konstantin, Sönksen, Jantje, Spokeviciute, Laima, Stefanova, Denitsa, Subrahmanyam, Marti G., Szaszi, Barnabas, Talavera, Oleksandr, Tang, Yuehua, Taylor, Nick, Tham, Wing Wah, Theissen, Erik, Thimme, Julian, Tonks, Ian, Tran, Hai, Trapin, Luca, Trolle, Anders B., Vaduva, M. Andreea, Valente, Giorgio, Van Ness, Robert A., Vasquez, Aurelio, Verousis, Thanos, Verwijmeren, Patrick, Vilhelmsson, Anders, Vilkov, Grigory, Vladimirov, Vladimir, Vogel, Sebastian, Voigt, Stefan, Wagner, Wolf, Walther, Thomas, Weiss, Patrick, Van Der Wel, Michel, Werner, Ingrid M., Westerholm, P. Joakim, Westheide, Christian, Wika, Hans C., Wipplinger, Evert, Wolf, Michael, Wolff, Christian C. P., Wolk, Leonard, Wong, Wing-Keung, Wrampelmeyer, Jan, Wu, Zhen-Xing, Xia, Shuo, Xiu, Dacheng, Xu, Ke, Xu, Caihong, Yadav, Pradeep K., Yagüe, José, Yan, Cheng, Yang, Antti, Yoo, Woongsun, Yu, Wenjia, Yu, Yihe, Yu, Shihao, Yueshen, Bart Z., Yuferova, Darya, Zamojski, Marcin, Zareei, Abalfazl, Zeisberger, Stefan M., Zhang, Lu, Zhang, S. Sarah, Zhang, Xiaoyu, Zhao, Lu, Zhong, Zhuo, Zhou, Z. Ivy, Zhou, Chen, Zhu, Xingyu S., Zoican, Marius, and Zwinkels, Remco

Abstract

In statistics, samples are drawn from a population in a data-generating process (DGP). Standard errors measure the uncertainty in estimates of population parameters. In science, evidence is generated to test hypotheses in an evidence-generating process (EGP). We claim that EGP variation across researchers adds uncertainty—nonstandard errors (NSEs). We study NSEs by letting 164 teams test the same hypotheses on the same data. NSEs turn out to be sizable, but smaller for more reproducible or higher rated research. Adding peer-review stages reduces NSEs. We further find that this type of uncertainty is underestimated by participants.

Published
2024

28. Non-Standard Errors

Author

Leerstoel Stigchel, Helmholtz Institute, Experimental Psychology (onderzoeksprogramma PF), Finance, UU LEG Research UUSE Multidisciplinary Economics, Sub General Pharmaceutics, Menkveld, Albert J., Abudy, Menachem (Meni), Grammig, Joachim, Gregoire, Vincent, Hagströmer, Björn, Hambuckers, Julien, Hapnes, Erik, Harris, Jeffrey H., Harris, Lawrence, Hartmann, Simon, Hasse, Jean-Baptiste, Hautsch, Nikolaus, Adrian, Tobias, He, Xue-Zhong 'Tony', Heath, Davidson, Hediger, Simon, Hendershott, Terrence J., Hibbert, Ann Marie, Hjalmarsson, Erik, Hoelscher, Seth, Hoffmann, Peter, Holden, Craig W., Horenstein, Alex R., Ait-Sahalia, Yacine, Huang, Wenqian, Huang, Da, Hurlin, Christophe, Ivashchenko, Alexey, Iyer, Subramanian R., Jahanshahloo, Hossein, Jalkh, Naji, Jones, Charles M., Jurkatis, Simon, Jylha, Petri, Akmansoy, Olivier, Kaeck, Andreas, Kaiser, Gabriel, Karam, Arzé, Karmaziene, Egle, Kassner, Bernhard, Kaustia, Markku, Kazak, Ekaterina, Kearney, Fearghal, van Kervel, Vincent, Khan, Saad, Alcock, Jamie, Khomyn, Marta, Klein, Tony, Klein, Olga, Klos, Alexander, Koetter, Michael, Krahnen, Jan Pieter, Kolokolov, Aleksey, Korajczyk, Robert A., Kozhan, Roman, Kwan, Amy, Alexeev, Vitali, Lajaunie, Quentin, Lam, Full Yet Eric Campbell, Lambert, Marie, Langlois, Hugues, Lausen, Jens, Lauter, Tobias, Leippold, Markus, Levin, Vladimir, Li, Yijie, Li, (Michael) Hui, Aloosh, Arash, Liew, Chee Yoong, Lindner, Thomas, Linton, Oliver B., Liu, Jiacheng, Liu, Anqi, Llorente-Alvarez, Jesus-Guillermo, Lof, Matthijs, Lohr, Ariel, Longstaff, Francis A., Lopez-Lira, Alejandro, Amato, Livia, Mankad, Shawn, Mano, Nicola, Marchal, Alexis, Martineau, Charles, Mazzola, Francesco, Meloso, Debrah C, Mihet, Roxana, Mohan, Vijay, Moinas, Sophie, Moore, David, Amaya, Diego, Mu, Liangyi, Muravyev, Dmitriy, Murphy, Dermot, Neszveda, Gabor, Neumeier, Christian, Nielsson, Ulf, Nimalendran, Mahendrarajah, Nolte, Sven, Nordén, Lars L., O'Neill, Peter, Angel, James J., Obaid, Khaled, Ødegaard, Bernt Arne, Östberg, Per, Painter, Marcus, Palan, Stefan, Palit, Imon, Park, Andreas, Pascual Gascó, Roberto, Pasquariello, Paolo, Pastor, Lubos, Dreber, Anna, Bach, Amadeus, Patel, Vinay, Patton, Andrew J., Pearson, Neil D., Pelizzon, Loriana, Pelster, Matthias, Pérignon, Christophe, Pfiffer, Cameron, Philip, Richard, Plíhal, Tomáš, Prakash, Puneet, Baidoo, Edwin, Press, Oliver-Alexander, Prodromou, Tina, Putnins, Talis J., Raizada, Gaurav, Rakowski, David A., Ranaldo, Angelo, Regis, Luca, Reitz, Stefan, Renault, Thomas, Wang, Renjie, Bakalli, Gaetan, Renò, Roberto, Riddiough, Steven, Rinne, Kalle, Rintamäki, Paul, Riordan, Ryan, Rittmannsberger, Thomas, Rodríguez Longarela, Iñaki, Rösch, Dominik, Rognone, Lavinia, Roseman, Brian, Barbon, Andrea, Rosu, Ioanid, Roy, Saurabh, Rudolf, Nicolas, Rush, Stephen, Rzayev, Khaladdin, Rzeźnik, Aleksandra, Sanford, Anthony, Sankaran, Harikumar, Sarkar, Asani, Sarno, Lucio, Bashchenko, Oksana, Scaillet, Olivier, Scharnowski, Stefan, Schenk-Hoppé, Klaus Reiner, Schertler, Andrea, Schneider, Michael, Schroeder, Florian, Schürhoff, Norman, Schuster, Philipp, Schwarz, Marco A., Seasholes, Mark S., Bindra, Parampreet Christopher, Seeger, Norman, Shachar, Or, Shkilko, Andriy, Shui, Jessica, Sikic, Mario, Simion, Giorgia, Smales, Lee A., Söderlind, Paul, Sojli, Elvira, Sokolov, Konstantin, Bjonnes, Geir Hoidal, Spokeviciute, Laima, Stefanova, Denitsa, Subrahmanyam, Marti G., Neusüss, Sebastian, Szaszi, Barnabas, Talavera, Oleksandr, Tang, Yuehua, Taylor, Nicholas, Tham, Wing Wah, Theissen, Erik, Black, Jeffrey R., Thimme, Julian, Tonks, Ian, Tran, Hai, Trapin, Luca, Trolle, Anders B., Valente, Giorgio, Van Ness, Robert A., Vasquez, Aurelio, Verousis, Thanos, Verwijmeren, Patrick, Black, Bernard S., Vilhelmsson, Anders, Vilkov, Grigory, Vladimirov, Vladimir, Vogel, Sebastian, Voigt, Stefan, Wagner, Wolf, Walther, Thomas, Weiss, Patrick, van der Wel, Michel, Werner, Ingrid M., Bohorquez, Santiago, Westerholm, P. Joakim, Westheide, Christian, Wipplinger, Evert, Wolf, Michael, Wolff, Christian C. P., Wolk, Leonard, Wong, Wing-Keung, Wrampelmeyer, Jan, Xia, Shuo, Xiu, Dacheng, Holzmeister, Felix, Bondarenko, Oleg, Xu, Ke, Xu, Caihong, Yadav, Pradeep K., Yagüe, José, Yan, Cheng, Yang, Antti, Yoo, Woongsun, Yu, Wenjia, Yu, Shihao, Yueshen, Bart Zhou, Bos, Charles S., Yuferova, Darya, Zamojski, Marcin, Zareei, Abalfazl, Zeisberger, Stefan, Zhang, Lu, Zhang, Xiaoyu, Zhong, Zhuo, Zhou, Z. Ivy, Zhou, Chen, Zhu, Xingyu, Bosch-Rosa, Ciril, Zoican, Marius, Zwinkels, Remco C.J., Chen, Jian, Duevski, Teodor, Gao, Ge, Gemayel, Roland, Gilder, Dudley, Kuhle, Paul, Pagnotta, Emiliano, Pelli, Michele, Bouri, Elie, Sönksen, Jantje, Ilczuk, Konrad, Bogoev, Dimitar, Qian, Ya, Wika, Hans C., Yu, Yihe, Zhao, Lu, Mi, Michael, Bao, Li, Brownlees, Christian T., Vaduva, Andreea, Prokopczuk, Marcel, Avetikian, Alejandro, Wu, Zhen-Xing, Calamia, Anna, Cao, Viet Nga, Capelle-Blancard, Gunther, Capera, Laura, Caporin, Massimiliano, Huber, Juergen, Carrion, Allen, Caskurlu, Tolga, Chakrabarty, Bidisha, Chernov, Mikhail, Cheung, William Ming Yan, Chincarini, Ludwig B., Chordia, Tarun, Chow, Sheung Chi, Clapham, Benjamin, Colliard, Jean-Edouard, Johanneson, Magnus, Comerton-Forde, Carole, Curran, Edward, Dao, Thong, Dare, Wale, Davies, Ryan J., De Blasis, Riccardo, De Nard, Gianluca, Declerck, Fany, Deev, Oleg, Degryse, Hans, Kirchler, Michael, Deku, Solomon, Desagre, Christophe, Dim, Chukwuma, Dimpfl, Thomas, Dong, Yun Jiang, Drummond, Philip, Dudda, Tom, Dumitrescu, Ariadna, Dyakov, Teodor, Razen, Michael, Dyhrberg, Anne Haubo, Dzieliński, Michał, Eksi, Asli, El Kalak, Izidin, ter Ellen, Saskia, Eugster, Nicolas, Evans, Martin D.D., Farrell, Michael, Félez-Viñas, Ester, Ferrara, Gerardo, Weitzel, Utz, FERROUHI, El Mehdi, Flori, Andrea, Fluharty-Jaidee, Jonathan, Foley, Sean, Fong, Kingsley Y. L., Foucault, Thierry, Franus, Tatiana, Franzoni, Francesco A., Frijns, Bart, Frömmel, Michael, Abad, David, Fu, Servanna Mianjun, Füllbrunn, Sascha, Gan, Baoqing, Gehrig, Thomas, Gerritsen, Dirk, Gil-Bazo, Javier, Glosten, Lawrence R., Gomez, Thomas, Gorbenko, Arseny, Güçbilmez, Ufuk, Van Dijk, Matthijs A., Leerstoel Stigchel, Helmholtz Institute, Experimental Psychology (onderzoeksprogramma PF), Finance, UU LEG Research UUSE Multidisciplinary Economics, Sub General Pharmaceutics, Menkveld, Albert J., Abudy, Menachem (Meni), Grammig, Joachim, Gregoire, Vincent, Hagströmer, Björn, Hambuckers, Julien, Hapnes, Erik, Harris, Jeffrey H., Harris, Lawrence, Hartmann, Simon, Hasse, Jean-Baptiste, Hautsch, Nikolaus, Adrian, Tobias, He, Xue-Zhong 'Tony', Heath, Davidson, Hediger, Simon, Hendershott, Terrence J., Hibbert, Ann Marie, Hjalmarsson, Erik, Hoelscher, Seth, Hoffmann, Peter, Holden, Craig W., Horenstein, Alex R., Ait-Sahalia, Yacine, Huang, Wenqian, Huang, Da, Hurlin, Christophe, Ivashchenko, Alexey, Iyer, Subramanian R., Jahanshahloo, Hossein, Jalkh, Naji, Jones, Charles M., Jurkatis, Simon, Jylha, Petri, Akmansoy, Olivier, Kaeck, Andreas, Kaiser, Gabriel, Karam, Arzé, Karmaziene, Egle, Kassner, Bernhard, Kaustia, Markku, Kazak, Ekaterina, Kearney, Fearghal, van Kervel, Vincent, Khan, Saad, Alcock, Jamie, Khomyn, Marta, Klein, Tony, Klein, Olga, Klos, Alexander, Koetter, Michael, Krahnen, Jan Pieter, Kolokolov, Aleksey, Korajczyk, Robert A., Kozhan, Roman, Kwan, Amy, Alexeev, Vitali, Lajaunie, Quentin, Lam, Full Yet Eric Campbell, Lambert, Marie, Langlois, Hugues, Lausen, Jens, Lauter, Tobias, Leippold, Markus, Levin, Vladimir, Li, Yijie, Li, (Michael) Hui, Aloosh, Arash, Liew, Chee Yoong, Lindner, Thomas, Linton, Oliver B., Liu, Jiacheng, Liu, Anqi, Llorente-Alvarez, Jesus-Guillermo, Lof, Matthijs, Lohr, Ariel, Longstaff, Francis A., Lopez-Lira, Alejandro, Amato, Livia, Mankad, Shawn, Mano, Nicola, Marchal, Alexis, Martineau, Charles, Mazzola, Francesco, Meloso, Debrah C, Mihet, Roxana, Mohan, Vijay, Moinas, Sophie, Moore, David, Amaya, Diego, Mu, Liangyi, Muravyev, Dmitriy, Murphy, Dermot, Neszveda, Gabor, Neumeier, Christian, Nielsson, Ulf, Nimalendran, Mahendrarajah, Nolte, Sven, Nordén, Lars L., O'Neill, Peter, Angel, James J., Obaid, Khaled, Ødegaard, Bernt Arne, Östberg, Per, Painter, Marcus, Palan, Stefan, Palit, Imon, Park, Andreas, Pascual Gascó, Roberto, Pasquariello, Paolo, Pastor, Lubos, Dreber, Anna, Bach, Amadeus, Patel, Vinay, Patton, Andrew J., Pearson, Neil D., Pelizzon, Loriana, Pelster, Matthias, Pérignon, Christophe, Pfiffer, Cameron, Philip, Richard, Plíhal, Tomáš, Prakash, Puneet, Baidoo, Edwin, Press, Oliver-Alexander, Prodromou, Tina, Putnins, Talis J., Raizada, Gaurav, Rakowski, David A., Ranaldo, Angelo, Regis, Luca, Reitz, Stefan, Renault, Thomas, Wang, Renjie, Bakalli, Gaetan, Renò, Roberto, Riddiough, Steven, Rinne, Kalle, Rintamäki, Paul, Riordan, Ryan, Rittmannsberger, Thomas, Rodríguez Longarela, Iñaki, Rösch, Dominik, Rognone, Lavinia, Roseman, Brian, Barbon, Andrea, Rosu, Ioanid, Roy, Saurabh, Rudolf, Nicolas, Rush, Stephen, Rzayev, Khaladdin, Rzeźnik, Aleksandra, Sanford, Anthony, Sankaran, Harikumar, Sarkar, Asani, Sarno, Lucio, Bashchenko, Oksana, Scaillet, Olivier, Scharnowski, Stefan, Schenk-Hoppé, Klaus Reiner, Schertler, Andrea, Schneider, Michael, Schroeder, Florian, Schürhoff, Norman, Schuster, Philipp, Schwarz, Marco A., Seasholes, Mark S., Bindra, Parampreet Christopher, Seeger, Norman, Shachar, Or, Shkilko, Andriy, Shui, Jessica, Sikic, Mario, Simion, Giorgia, Smales, Lee A., Söderlind, Paul, Sojli, Elvira, Sokolov, Konstantin, Bjonnes, Geir Hoidal, Spokeviciute, Laima, Stefanova, Denitsa, Subrahmanyam, Marti G., Neusüss, Sebastian, Szaszi, Barnabas, Talavera, Oleksandr, Tang, Yuehua, Taylor, Nicholas, Tham, Wing Wah, Theissen, Erik, Black, Jeffrey R., Thimme, Julian, Tonks, Ian, Tran, Hai, Trapin, Luca, Trolle, Anders B., Valente, Giorgio, Van Ness, Robert A., Vasquez, Aurelio, Verousis, Thanos, Verwijmeren, Patrick, Black, Bernard S., Vilhelmsson, Anders, Vilkov, Grigory, Vladimirov, Vladimir, Vogel, Sebastian, Voigt, Stefan, Wagner, Wolf, Walther, Thomas, Weiss, Patrick, van der Wel, Michel, Werner, Ingrid M., Bohorquez, Santiago, Westerholm, P. Joakim, Westheide, Christian, Wipplinger, Evert, Wolf, Michael, Wolff, Christian C. P., Wolk, Leonard, Wong, Wing-Keung, Wrampelmeyer, Jan, Xia, Shuo, Xiu, Dacheng, Holzmeister, Felix, Bondarenko, Oleg, Xu, Ke, Xu, Caihong, Yadav, Pradeep K., Yagüe, José, Yan, Cheng, Yang, Antti, Yoo, Woongsun, Yu, Wenjia, Yu, Shihao, Yueshen, Bart Zhou, Bos, Charles S., Yuferova, Darya, Zamojski, Marcin, Zareei, Abalfazl, Zeisberger, Stefan, Zhang, Lu, Zhang, Xiaoyu, Zhong, Zhuo, Zhou, Z. Ivy, Zhou, Chen, Zhu, Xingyu, Bosch-Rosa, Ciril, Zoican, Marius, Zwinkels, Remco C.J., Chen, Jian, Duevski, Teodor, Gao, Ge, Gemayel, Roland, Gilder, Dudley, Kuhle, Paul, Pagnotta, Emiliano, Pelli, Michele, Bouri, Elie, Sönksen, Jantje, Ilczuk, Konrad, Bogoev, Dimitar, Qian, Ya, Wika, Hans C., Yu, Yihe, Zhao, Lu, Mi, Michael, Bao, Li, Brownlees, Christian T., Vaduva, Andreea, Prokopczuk, Marcel, Avetikian, Alejandro, Wu, Zhen-Xing, Calamia, Anna, Cao, Viet Nga, Capelle-Blancard, Gunther, Capera, Laura, Caporin, Massimiliano, Huber, Juergen, Carrion, Allen, Caskurlu, Tolga, Chakrabarty, Bidisha, Chernov, Mikhail, Cheung, William Ming Yan, Chincarini, Ludwig B., Chordia, Tarun, Chow, Sheung Chi, Clapham, Benjamin, Colliard, Jean-Edouard, Johanneson, Magnus, Comerton-Forde, Carole, Curran, Edward, Dao, Thong, Dare, Wale, Davies, Ryan J., De Blasis, Riccardo, De Nard, Gianluca, Declerck, Fany, Deev, Oleg, Degryse, Hans, Kirchler, Michael, Deku, Solomon, Desagre, Christophe, Dim, Chukwuma, Dimpfl, Thomas, Dong, Yun Jiang, Drummond, Philip, Dudda, Tom, Dumitrescu, Ariadna, Dyakov, Teodor, Razen, Michael, Dyhrberg, Anne Haubo, Dzieliński, Michał, Eksi, Asli, El Kalak, Izidin, ter Ellen, Saskia, Eugster, Nicolas, Evans, Martin D.D., Farrell, Michael, Félez-Viñas, Ester, Ferrara, Gerardo, Weitzel, Utz, FERROUHI, El Mehdi, Flori, Andrea, Fluharty-Jaidee, Jonathan, Foley, Sean, Fong, Kingsley Y. L., Foucault, Thierry, Franus, Tatiana, Franzoni, Francesco A., Frijns, Bart, Frömmel, Michael, Abad, David, Fu, Servanna Mianjun, Füllbrunn, Sascha, Gan, Baoqing, Gehrig, Thomas, Gerritsen, Dirk, Gil-Bazo, Javier, Glosten, Lawrence R., Gomez, Thomas, Gorbenko, Arseny, Güçbilmez, Ufuk, and Van Dijk, Matthijs A.

Published
2024

29. Spinor Bose-Einstein gases

Author

Marti, G. Edward and Stamper-Kurn, Dan M.

Subjects
Condensed Matter - Quantum Gases, Quantum Physics
Abstract

In a spinor Bose-Einstein gas, the non-zero hyperfine spin of the gas becomes an accessible degree of freedom. At low temperature, such a gas shows both magnetic and superfluid order, and undergoes both density and spin dynamics. These lecture notes present a general overview of the properties of spinor Bose-Einstein gases. The notes are divided in five sections. In the first, we summarize basic properties of multi-component quantum fluids, focusing on the specific case of spinor Bose-Einstein gases and the role of rotational symmetry in defining their properties. Second, we consider the magnetic state of a spinor Bose-Einstein gas, highlighting effects of thermodynamics and Bose-Einstein statistics and also of spin-dependent interactions between atoms. In the third section, we discuss methods for measuring the properties of magnetically ordered quantum gases and present newly developed schemes for spin-dependent imaging. We then discuss the dynamics of spin mixing in which the spin composition of the gas evolves through the spin-dependent interactions within the gas. We discuss spin mixing first from a microscopic perspective, and then advance to discussing collective and beyond-mean-field dynamics. The fifth section reviews recent studies of the magnetic excitations of quantum-degenerate spinor Bose gases. We conclude with some perspectives on future directions for research., Comment: 70 pages, 22 figures. Lecture notes for the 2014 Enrico Fermi Summer School on Quantum Matter at Ultralow Temperatures

Published
2015

30. Thermometry and cooling of a Bose-Einstein condensate to 0.02 times the critical temperature

Author

Olf, Ryan, Fang, Fang, Marti, G. Edward, MacRae, Andrew, and Stamper-Kurn, Dan M.

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics, Quantum Physics
Abstract

Ultracold gases promise access to many-body quantum phenomena at convenient length and time scales. However, it is unclear whether the entropy of these gases is low enough to realize many phenomena relevant to condensed matter physics, such as quantum magnetism. Here we report reliable single-shot temperature measurements of a degenerate $^{87}$Rb gas by imaging the momentum distribution of thermalized magnons, which are spin excitations of the atomic gas. We record average temperatures as low as $0.022(1)_\text{stat}(2)_\text{sys}$ times the Bose-Einstein condensation temperature, indicating an entropy per particle, $S/N\approx0.001\, k_B$ at equilibrium, that is well below the critical entropy for antiferromagnetic ordering of a Bose-Hubbard system. The magnons themselves can reduce the temperature of the system by absorbing energy during thermalization and by enhancing evaporative cooling, allowing low-entropy gases to be produced within deep traps., Comment: 8 pages, 3 figures, including methods; Supplemental material: 2 pages, 1 figure

Published
2015
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31. Uncertainties of optical-model parameters for the study of the threshold anomaly

Author

Abriola, Daniel, Arazi, A., Testoni, J., Gollan, F., and Martí, G. V.

Subjects
Nuclear Experiment
Abstract

In the analysis of elastic-scattering experimental data, optical-model parameters (usually, depths of real and imaginary potentials) are fitted and conclusions are drawn analyzing their variations at bombardment energies close to the Coulomb barrier (threshold anomaly). The judgement about the shape of this variation (related to the physical processes producing this anomaly) depends on these fitted values but the robustness of the conclusions strongly depends on the uncertainties with which these parameters are derived. We will show that previous published studies have not used a common criterium for the evaluation of the parameter uncertainties. In this work, a study of these uncertainties is presented, using conventional statistic tools as well as bootstrapping techniques. As case studies, these procedures are applied to re-analyze detailed elastic-scattering data for the $^{12}$C + $^{208}$Pb and the $^6$Li + $^{80}$Se systems., Comment: Presented to the XXVII RTFNB 8-12 September 2014, Maresias, Brasil

Published
2015

32. Systematic evaluation of an atomic clock at 2e-18 total uncertainty

Author

Nicholson, T. L., Campbell, S. L., Hutson, R. B., Marti, G. E., Bloom, B. J., McNally, R. L., Zhang, W., Barrett, M. D., Safronova, M. S., Strouse, G. F., Tew, W. L., and Ye, J.

Subjects
Physics - Atomic Physics
Abstract

The pursuit of better atomic clocks has advanced many research areas, providing better quantum state control, new insights in quantum science, tighter limits on fundamental constant variation, and improved tests of relativity. The record for the best stability and accuracy is currently held by optical lattice clocks. This work takes an important step towards realizing the full potential of a many-particle clock with a state-of-the-art stable laser. Our 87Sr optical lattice clock now achieves fractional stability of 2.2e-16 at 1 s. With this improved stability, we perform a new accuracy evaluation of our clock, reducing many systematic uncertainties that limited our previous measurements, such as those in the lattice ac Stark shift, the atoms' thermal environment, and the atomic response to room-temperature BBR. Our combined measurements have reduced the total uncertainty of the JILA Sr clock to 2.1e-18 in fractional frequency units., Comment: Full published version

Published
2014
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34. Coherent magnon optics in a ferromagnetic spinor Bose-Einstein condensate

Author

Marti, G. Edward, MacRae, Andrew, Olf, Ryan, Lourette, Sean, Fang, Fang, and Stamper-Kurn, Dan M.

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics, Quantum Physics
Abstract

We measure the mass, gap, and magnetic moment of a magnon in the ferromagnetic $F=1$ spinor Bose-Einstein condensate of $^{87}$Rb. We find an unusually heavy magnon mass of $1.038(2)_\mathrm{stat}(8)_\mathrm{sys}$ times the atomic mass, as determined by interfering standing and running coherent magnon waves within the dense and trapped condensed gas. This measurement is shifted significantly from theoretical estimates. The magnon energy gap of $h\times 2.5(1)_\mathrm{stat}(2)_\mathrm{sys}\;\mathrm{Hz}$ and the effective magnetic moment of $-1.04(2)_\mathrm{stat}(8)\,\mu_\textrm{bare}$ times the atomic magnetic moment are consistent with mean-field predictions. The nonzero energy gap arises from magnetic dipole-dipole interactions., Comment: 5 pages, 3 figures

Published
2014
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39. Collective Excitation Interferometry with a Toroidal Bose-Einstein Condensate

Author

Marti, G. Edward, Olf, Ryan, and Stamper-Kurn, Dan M.

Subjects
Condensed Matter - Quantum Gases, Physics - Atomic Physics, Quantum Physics
Abstract

The precision of compact inertial sensing schemes using trapped- and guided-atom interferometers has been limited by uncontrolled phase errors caused by trapping potentials and interactions. Here, we propose an acoustic interferometer that uses sound waves in a toroidal Bose-Einstein condensate to measure rotation, and we demonstrate experimentally several key aspects of this type of interferometer. We use spatially patterned light beams to excite counter-propagating sound waves within the condensate and use \emph{in situ} absorption imaging to characterize their evolution. We present an analysis technique by which we extract separately the oscillation frequencies of the standing-wave acoustic modes, the frequency splitting caused by static imperfections in the trapping potential, and the characteristic precession of the standing-wave pattern due to rotation. Supported by analytic and numerical calculations, we interpret the noise in our measurements, which is dominated by atom shot noise, in terms of rotation noise. While the noise of our acoustic interferometric sensor, at the level of $\sim \mbox{rad}\, \mbox{s}^{-1}/\sqrt{\mbox{Hz}}$, is high owing to rapid acoustic damping and the small radius of the trap, the proof-of-concept device does operate at $10^4 - 10^6$ times higher density and in a volume $10^9$ times smaller than free-falling atom interferometers., Comment: 11 pages including supplemental material, 7 figures

Published
2012
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41. Enhanced and reduced atom number fluctuations in a BEC splitter

Author

Maussang, Kenneth, Marti, G. Edward, Schneider, Tobias, Treutlein, Philipp, Li, Yun, Sinatra, Alice, Long, Romain, Estève, Jérôme, and Reichel, Jakob

Subjects
Quantum Physics, Condensed Matter - Quantum Gases
Abstract

We measure atom number statistics after splitting a gas of ultracold 87Rb atoms in a purely magnetic double-well potential created on an atom chip. Well below the critical temperature for Bose-Einstein condensation T_c, we observe reduced fluctuations down to -4.9dB below the atom shot noise level. Fluctuations rise to more than +3.8dB close to T_c, before reaching the shot noise level for higher temperatures. We use two-mode and classical field simulations to model these results. This allows us to confirm that the super-shot noise fluctuations directly originate from quantum statistics.

Published
2010
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42. Two-element Zeeman Slower for Rubidium and Lithium

Author

Marti, G. Edward, Olf, Ryan, Vogt, Enrico, Öttl, Anton, and Stamper-Kurn, Dan M.

Subjects
Physics - Atomic Physics
Abstract

We demonstrate a two-element oven and Zeeman slower that produce simultaneous and overlapped slow beams of rubidium and lithium. The slower uses a three-stage design with a long, low acceleration middle stage for decelerating rubidium situated between two short, high acceleration stages for aggressive deceleration of lithium. This design is appropriate for producing high fluxes of atoms with a large mass ratio in a simple, robust setup., Comment: 6 pages, 6 figures

Published
2010
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43. Can Central Banks Boost Corporate Investment? Evidence from ECB Liquidity Injections

Author

Stine Louise von Rüden, Marti G Subrahmanyam, Dragon Yongjun Tang, and Sarah Qian Wang

Subjects
Economics and Econometrics, Business and International Management, Finance
Abstract

Liquidity injections by central banks have become frequent and massive, but their real effects on corporate investment remain unclear. We examine the longer-term refinancing operations (LTROs) of the European Central Bank (ECB) during the eurozone sovereign crisis and show that greater LTRO funding to banks is associated with lower corporate investment. Riskier banks received funds through the LTROs and subsequently increased their holdings of risky sovereign debt. Corporate investment reductions are associated with these banks. Further, concurrent fiscal and regulatory policies impeded the effectiveness of the ECB liquidity injections. Our findings identify the contributing factors for these failures of monetary policy. (JEL E52, E58, G32) Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.

Published
2023
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45. Credit Default Swaps around the World.

Author

Bartram, Söhnke M, Conrad, Jennifer, Lee, Jongsub, and Subrahmanyam, Marti G

Subjects
CREDIT default swaps, DECISION making, DEBT, UNCERTAINTY, FINANCIAL leverage, CREDIT derivatives
Abstract

We analyze the impact of the introduction of credit default swaps (CDSs) on real decision-making within the firm. Our structural model predicts that CDS introduction increases debt capacity more when uncertainty about the credit events that trigger CDS payment is lower. Using a sample of more than 56,000 firms across 51 countries, we find that CDSs increase leverage more in legal and market environments where uncertainty about CDS obligations is reduced and when property rights are weaker. Our results highlight the importance of legal uncertainty in the interpretation of the underlying trigger events of global credit derivatives. [ABSTRACT FROM AUTHOR]

Published
2022
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47. The Plant Traits That Drive Ecosystems: Evidence from Three Continents

Author

Díaz, S., Hodgson, J. G., Thompson, K., Cabido, M., Cornelissen, J. H. C., Jalili, A., Montserrat-Martí, G., Grime, J. P., Zarrinkamar, F., Asri, Y., Band, S. R., Basconcelo, S., Castro-Díez, P., Funes, G., Hamzehee, B., Khoshnevi, M., Pérez-Harguindeguy, N., Pérez-Rontomé, M. C., Shirvany, F. A., Vendramini, F., Yazdani, S., Abbas-Azimi, R., Bogaard, A., Boustani, S., Charles, M., Dehghan, M., de Torres-Espuny, L., Falczuk, V., Guerrero-Campo, J., Hynd, A., Jones, G., Kowsary, E., Kazemi-Saeed, F., Maestro-Martínez, M., Romo-Díez, A., Shaw, S., Siavash, B., Villar-Salvador, P., and Zak, M. R.

Published
2004

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