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307 results on '"Aspect, Alain"'

4. Observation of $1/k^4$-tails after expansion of Bose-Einstein Condensates with impurities

Author

Cayla, Hugo, Massignan, Pietro, Giamarchi, Thierry, Aspect, Alain, Westbrook, Christoph I., and Clément, David

Subjects
Condensed Matter::Quantum Gases, Quantum Gases (cond-mat.quant-gas), Atomic Physics (physics.atom-ph), FOS: Physical sciences, Condensed Matter::Strongly Correlated Electrons, Condensed Matter - Quantum Gases, Physics - Atomic Physics
Abstract

We measure the momentum density in a Bose-Einstein condensate (BEC) with dilute spin impurities after an expansion in the presence of interactions. We observe tails decaying as $1/k^4$ at large momentum $k$ in the condensate and in the impurity cloud. These algebraic tails originate from the impurity-BEC interaction, but their amplitudes greatly exceed those expected from two-body contact interactions at equilibrium in the trap. Furthermore, in the absence of impurities, such algebraic tails are not found in the BEC density measured after the interaction-driven expansion. These results highlight the key role played by impurities when present, a possibility that had not been considered in our previous work [Phys. Rev. Lett. 117, 235303 (2016)]. Our measurements suggest that these unexpected algebraic tails originate from the non-trivial dynamics of the expansion in the presence of impurity-bath interactions., 6 pages, 6 figures

Published
2022

9. Direct observation of Anderson localization of matter waves in a controlled disorder

Author

Billy, Juliette, Josse, Vincent, Zuo, Zhanchun, Bernard, Alain, Hambrecht, Ben, Lugan, Pierre, Clement, David, Sanchez-Palencia, Laurent, Bouyer, Philippe, and Aspect, Alain

Subjects
Bose-Einstein condensation -- Research, Wave-particle duality -- Research, Diffusion processes -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation, Research
Abstract

In 1958, Anderson predicted the localization (1) of electronic wave-functions in disordered crystals and the resulting absence of diffusion. It is now recognized that Anderson localization is ubiquitous in wave [...]

Published
2008

10. Hanburry Brown and Twiss, Hong Ou and Mandel effects and other landmarks in Quantum Optics: from photons to atoms

Author

Aspect, Alain

Subjects
Quantum Physics, Physics - History and Philosophy of Physics, History and Philosophy of Physics (physics.hist-ph), FOS: Physical sciences, Physics::Optics, Quantum Physics (quant-ph)
Abstract

In this lecture, I first present my views on the second vs the first quantum revolution, then describe the Hanbury Brown and Twiss effect with photons, and indicate why it was so important in the development of modern quantum optics. The presentation of our experiments on the HBT effect with atoms will allow me to emphasize the analogies but also the increased richness of the effect when going from photons to atoms. I will similarly describe the HOM effect for photons and its significance, and then present the analogous experiment with atoms. In conclusion, I will put these two effects in the long list of landmarks in the development of quantum optics, and indicate what has been done and what remains to be done with atoms in lieu of photons., 22 pages, 13 figures. Published as Chapter 12 in the proceedings of the Les Houches Summer School 1996 : {\it Current Trends in Atomic Physics.} Edited by Antoine Browaeys, Trey Porto, Charles S. Adams, Matthias Weidemuller, and Leticia F. Cugliandolo. Oxford University Press (2019). DOI: 10.1093/oso/9780198837190.003.0012

Published
2020

11. Computing the spectral functions of ultracold atoms using the localization landscape

Author

Pelletier, Pierre, Guo, Yukun, Josse, Vincent, Delande, Dominique, Arnold, Douglas, Aspect, Alain, Mayboroda, Svitlana, Filoche, Marcel, Laboratoire de physique de la matière condensée (LPMC), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Charles Fabry / Gaz Quantiques, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Laboratoire Kastler Brossel (LKB (Jussieu)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), School of Mathematics (UMN-MATH), University of Minnesota [Twin Cities] (UMN), and University of Minnesota System-University of Minnesota System

Subjects
[PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph], [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

15. From Einstein's LichtQuanten to Wheeler's delayed choice experiment: wave particle duality for a single photon (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

16. Two-Particle Four-Mode Interferometer for Atoms (poster)

Author

Dussarrat, Pierre, Perrier, Maxime, Imanaliev, Almazbek, Lopes, Raphael, Aspect, Alain, Cheneau, Marc, Boiron, Denis, Westbrook, Chris, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Cheneau, Marc, and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], [PHYS.COND.GAS] Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph]
Abstract

International audience; • We present a free-space interferometer to observe two-particle interference of a pair of atoms with entangled momenta. • The source of atom pairs is a Bose-Einstein condensate subject to a dynamical instability, and the interferometer is realized using Bragg diiraction on optical lattices. • Our observations rule out the possibility of a purely mixed state at the input of the interferometer. • Our current setup can be extended to enable a test of a Bell inequality on momentum observables. Bragg mirror and splitters momentum energy excited state • Mirror: 100 µs pulse (π-pulse) • Splitter: 50 µs pulse (π/2-pulse) • The lasers imprint their phase on the atomic modes (φ A,B) • Spectral broadening induced by the short interaction time: → the same lattice addresses (p,-p') and (-p, p') → addition of a velocity-dependent phase away from the energy resonance • Correlation coefficient: E = V cos(φ A-φ B-2δτ) Interferometer diagram • Input state: • Joint detection probabilities: • Correlation coeecient: • Violation of a Bell inequality if V > 1/√2 Source of atom pairs quasimomentum in the lattice frame energy lowest Bloch band 1st BZ • Dynamical instability driven by moving optical lattice → emission of atom pairs with opposite momenta • Broad resonance → several pairs of modes are coherently populated • Filtering the data reduces the state to the desired form: center-of-mass frame • Analysis of 3 diierent sets of modes → access to 3 diierent phases (φ A-φ B-2δτ)

Published
2017

17. HBT, HOM, Bell, from photons to atoms: quantum optics landmarks revisited (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

18. Du photon d'Einstein au choix retardé de Wheeler : dualité ondes particules pour un photon unique (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

19. Anderson transition, towards the precise investigation of the critical regime (Poster)

Author

Lecoutre, Baptiste, Mukhtar, Musawwadah, Volchkov, Valentin, Denechaud, Vincent, Aspect, Alain, Josse, Vincent, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

20. Selective final state spectroscopy and multifractality in two-component ultracold Bose-Einstein condensates: a numerical study

Author

Werner, Mikl��s Antal, Demler, Eugene, Aspect, Alain, and Zar��nd, Gergely

Subjects
Quantum Gases (cond-mat.quant-gas), FOS: Physical sciences, Disordered Systems and Neural Networks (cond-mat.dis-nn), Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Quantum Gases
Abstract

We propose to use the method introduced by Volchkov et al., based on state dependent disordered ultracold bosons, to address the critical state at the mobility edge of the Anderson localization transition, and to observe its intriguing multifractal structure. An optimally designed external radio frequency pulse can be applied to generate transitions to eigenstates in a narrow energy window close to the mobility edge, where critical scaling and multifractality emerge. Two-photon laser scanning microscopy will be used to address individual localized states even close to the transition. The projected image of the cloud is shown to inherit multifractality and to display universal density correlations. Time of flight images of the excited states are predicted to show interference fringes in the localized phase, while they allow one to map equal energy surfaces deep in the metallic phase.

Published
2017

21. The magic of time reversed de Broglie waves in a disordered potential (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

22. From Einstein's doubts to quantum information: the second quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

23. HBT, HOM, Bell, from photons to atoms: landmarks in the second quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

24. From the Einstein-Bohr debate to quantum information: the second quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Quantum Physics, Physics::History of Physics
Abstract

International audience; In 1935, with co-authors Podolsky and Rosen, Einstein discovered a weird quantum situation, in which particles in a pair are so strongly correlated that Schrödinger called them “entangled”. By analyzing that situation, Einstein concluded that the quantum formalism is incomplete. Niels Bohr immediately opposed that conclusion, and the debate lasted until the death of these two giants of physics. In 1964, John Bell discovered that it is possible to settle the debate experimentally, by testing the now celebrated "Bell's inequalities", and to show directly that the revolutionary concept of entanglement is indeed a reality. A long series of experiments, started in 1972, have produced more and more precise results, in situations closer and closer to the ideal theoretical scheme.After explaining the debate, and describing some experiments, I will show how this conceptual discussion has prompted the emergence of the new field of quantum information, at the heart of the second quantum revolution.

Published
2017

25. From Hong-Ou-Mandel the Bell with momentum entangled atoms: more and more quantum (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

26. From Einstein’s Doubts to Quantum Information: A New Quantum Revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Quantum Physics, Physics::History of Physics
Abstract

International audience; In 1935, with co-authors Podolsky and Rosen, Einstein discovered a weird quantum situation, in which particles in a pair are so strongly correlated that Schrödinger called them “entangled”. By analyzing that situation, Einstein concluded that the quantum formalism is incomplete. Niels Bohr immediately opposed that conclusion, and the debate lasted until the death of these two giants of physics. In 1964, John Bell discovered that it is possible to settle the debate experimentally, by testing the now celebrated "Bell's inequalities", and to show directly that the revolutionary concept of entanglement is indeed a reality. A long series of experiments, started in 1972, yielded more and more precise results, in situations closer and closer to the ideal theoretical scheme. After explaining the debate and describing some experiments, we will show in this talk how this conceptual discussion has prompted the emergence of the new field of quantum information and quantum technologies.

Published
2017

27. The Hanbury Brown and Twiss, the Hong-Ou-mandel effect: Landmarks in the second quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

28. An atomic Hong-Ou-Mandel experiment (Orale)

Author

Boiron, Denis, Lopes, Raphael, Imanaliev, Almazbek, Dussarrat, Pierre, Perrier, Maxime, Aspect, Alain, Cheneau, Marc, Westbrook, Christoph I, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

29. Atomic HBC and HOM effects: Beyond matter-wave optics, quantum atom optics (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

30. The Hong-Ou-Mandel effect: a Milestone of the second quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

31. The Hanbury Brown and Twiss, the Hong-Ou-mandel effect: Landmarks in quantum optics... Of photons and atoms (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

32. Measurements of spectral functions of ultracold atoms in a speckle potential (Poster)

Author

Mukhtar, Musawwadah, Volchkov, Valentin, Pasek, Michael, Denechaud, Vincent, Aspect, Alain, Delande, Dominique, Josse, Vincent, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

33. The second quantum revolution: a new world of possibilities (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

34. Suppression and revival of weak localization through manipulation of time-reversal symmetry (Poster)

Author

Denechaud, Vincent, Mukhtar, Musawwadah, Volchkov, Valentin, Richard, Jérémie, Müller, Kilian, Aspect, Alain, Josse, Vincent, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

35. Suppression and Revival of Weak Localization of Ultra-Cold Atoms by Manipulation of Time-Reversal Symmetry (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Physics::Atomic Physics, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; In the early 1980's, observation of a magneto-resistance anomaly in metallic thin films was attributed to the phenomenon of weak localization of electrons and to time-reversal symmetry breaking due to a magnetic field acting upon charged particles.We have observed weak localization of ultra-cold atoms in a 2D configuration, placed in a disordered potential created by a laser speckle. In order to manipulate time-reversal symmetry with our neutral atoms, we take advantage of the slow evolution of our system, and we observe the suppression and revival of weak localization when time reversal symmetry is cancelled and reestablished.

Published
2016

36. Measurements of spectral functions of ultracold atoms in a speckle potential (Orale)

Author

Mukhtar, Musawwadah, Volchkov, Valentin, Pasek, Michael, Denechaud, Vincent, Aspect, Alain, Delande, Dominique, Josse, Vincent, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

37. Anderson localization of ultracold atoms

Author

Aspect, Alain and Inguscio, Massimo

Subjects
Physicists -- Research, Bose-Einstein condensation -- Analysis, Phase transformations (Statistical physics) -- Analysis, Quantum theory -- Research, Physics
Published
2009

38. From Bell's inequalities to quantum information: a new quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), and Pereira, Fatima

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

39. From the Einstein-Bohr debate to quantum technologies: a new quantum revolution (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

40. Atomic Hong-Ou-Mandel effect (Orale)

Author

Boiron, Denis, Lopes, Raphael, Imanaliev, Almazbek, Cheneau, Marc, Aspect, Alain, Westbrook, Christoph I, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

41. The magic of time reversed de Broglie waves (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

42. Atomic analogue of the Hong-Ou-Mandel effect (Orale)

Author

Boiron, Denis, Lopes, Raphael, Imanaliev, Almazbek, Aspect, Alain, Cheneau, Marc, Westbrook, Christoph I, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

43. From the Einstein-Bohr debate to Bell's inequalities tests: precision measurements settle a conceptual debate (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

44. Suppression and revival of weak localization by manipulation of time reversal symmetry: coherent back scattering revival (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

45. From Einstein's questions to quantum bits: a new quantum revolution? (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

46. An atomic Hong-Ou-Mandel experiment (Orale)

Author

Lopes, Raphael, Imanaliev, Almazbek, Aspect, Alain, Cheneau, Marc, Westbrook, Christoph I, Boiron, Denis, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Fernando Martín, and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

47. From Einstein to Wheeler: wave particle duality for a single photon (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

48. The atomic Hong-Ou-Mandel effect: a landmark in quantum atom optics (Orale)

Author

Aspect, Alain, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

49. Atomic Hong OU Mandel experiment (Orale)

Author

Westbrook, Christoph I, Aspect, Alain, Imanaliev, Almazbek, Boiron, Denis, Cheneau, Marc, Lopes, Raphaël, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Entangled atoms, Two particle interference, Atom interferometry
Abstract

International audience; The quantum theory has introduced physicists to two major counter-intuitive concepts. On the one hand, there is wave-particle duality, which means that objects normally described as particles can also behave as waves, while entities primarily described as waves, such as light, can behave as particles. This revolutionary idea nevertheless relies on concepts borrowed from classical physics, either waves or particles evolving in an ordinary space-time. On the other hand, entanglement can lead to interferences between the amplitudes of multi-particle states, which happen in Hilbert space and have no classical counter-part. This fundamental feature has of course been strikingly demonstrated by the violation of Bell’s inequalities. There is however, a conceptually simpler situation in which the interference between two-particle amplitudes entails a behavior impossible to describe by any classical model. This is the celebrated Hong Ou and Mandel experiment, in which two photons arriving simultaneously in the input channels of a beam-splitter always emerge together in one of the output channels [1]. This effect has been extensively used to characterize the quality of non-classical light sources. In Palaiseau, our group has realized a close analog to the Hong Ou Mandel experiment using atoms [2]. I will discuss the experiment and comment on prospects for extending our methods to other, traditionally optical experiments such as the violation of Bell's inequalities with atoms. Two particle interference has been recently observed in several non-photon systems and I will also try make some remarks concerning these experiments [3]. References[1]C. K. Hong, Z. Y. Ou, L Mandel, Physical Review Letters 59, 2044 (1987).[2]R. Lopes et al. arXiv:1501.03065. [3]A. M. Kaufmann et al. Science 345 306 (2014).

Published
2015

50. Ultracold Atoms in Disorder: Momentum Space Investigations (Orale)

Author

Richard, Jérémie, Volchkov, Valentin, Denechaud, Vincent, Müller, Kilian, Aspect, Alain, Josse, Vincent, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)

Subjects
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

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