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847 results on '"Walmsley, I. A."'

201. Space-quest, experiments with quantum entanglement in space

Author

Ursin, R., Jennewein, T., Kofler, J., Perdigues, J.M., Cacciapuoti, L., de Matos, C.J., Aspelmeyer, M., Valencia, A., Scheidl, T., Acin, A., Barbieri, C., Bianco, G., Brukner, C., Capmany, J., Cova, S., Giggenbach, D., Leeb, W., Hadfield, R.H., Laflamme, R., Lütkenhaus, N., Milburn, G., Peev, M., Ralph, T., Rarity, J., Renner, R., Samain, E., Solomos, N., Tittel, W., Torres, J.P., Toyoshima, M., Ortigosa-Blanch, A., Pruneri, V., Villoresi, P., Walmsley, I., Weihs, G., Weinfurter, H., Zukowski, M., and Zeilinger, A.

Published
2009

202. Quantum path interferences in high-harmonic generation: Ionization effects and spatial structure

Author

Gallmann, L, Holler, M, Za�r, A, Schapper, F, Auguste, T, Cormier, E, Wyatt, A, Monmayrant, A, Walmsley, I, Sali�res, P, Keller, U, Zaïr, A, and Salières, P

Abstract

We investigate the influence of microscopic and macroscopic ionization effects on the intensity-dependent quantum-path interferences in high-harmonic generation. The resulting interference structures were analyzed in different gases and in spatially resolved harmonic spectra. © 2009 Optical Society of America.

Published
2009

204. Modematching an optical quantum memory

Author

Nunn, J, Walmsley, I A, Raymer, M G, Surmacz, K, Waldermann, F C, Wang, Z, and Jaksch, D

Subjects
Quantum Physics, FOS: Physical sciences, Quantum Physics (quant-ph)
Abstract

We analyse the off-resonant Raman interaction of a single broadband photon, copropagating with a classical `control' pulse, with an atomic ensemble. It is shown that the classical electrodynamical structure of the interaction guarantees canonical evolution of the quantum mechanical field operators. This allows the interaction to be decomposed as a beamsplitter transformation between optical and material excitations on a mode-by-mode basis. A single, dominant modefunction describes the dynamics for arbitrary control pulse shapes. Complete transfer of the quantum state of the incident photon to a collective dark state within the ensemble can be achieved by shaping the control pulse so as to match the dominant mode to the temporal mode of the photon. Readout of the material excitation, back to the optical field, is considered in the context of the symmetry connecting the input and output modes. Finally, we show that the transverse spatial structure of the interaction is characterised by the same mode decomposition., Comment: 17 pages, 4 figures. Brief section added treating the transverse spatial structure of the memory interaction. Some references added. A few typos fixed

Published
2006
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210. Quantum memories

Author

Simon, C., Afzelius, M., Appel, J., de la Giroday, A. Boyer, Dewhurst, S. J., Gisin, N., Hu, C. Y., Jelezko, F., Kroll, S., Muller, J. H., Nunn, J., Polzik, E. S., Rarity, J. G., De Riedmatten, H., Rosenfeld, W., Shields, A. J., Skoeld, N., Stevenson, R. M., Thew, R., Walmsley, I. A., Weber, M. C., Weinfurter, H., Wrachtrup, J., Young, R. J., Simon, C., Afzelius, M., Appel, J., de la Giroday, A. Boyer, Dewhurst, S. J., Gisin, N., Hu, C. Y., Jelezko, F., Kroll, S., Muller, J. H., Nunn, J., Polzik, E. S., Rarity, J. G., De Riedmatten, H., Rosenfeld, W., Shields, A. J., Skoeld, N., Stevenson, R. M., Thew, R., Walmsley, I. A., Weber, M. C., Weinfurter, H., Wrachtrup, J., and Young, R. J.

Abstract

We perform a review of various approaches to the implementation of quantum memories, with an emphasis on activities within the quantum memory sub-project of the EU integrated project "Qubit Applications". We begin with a brief overview over different applications for quantum memories and different types of quantum memories. We discuss the most important criteria for assessing quantum memory performance and the most important physical requirements. Then we review the different approaches represented in "Qubit Applications" in some detail. They include solid-state atomic ensembles, NV centers, quantum dots, single atoms, atomic gases and optical phonons in diamond. We compare the different approaches using the discussed criteria.

Published
2010

215. High-efficiency Bragg grating enhanced on-chip photon-number-resolving detectors

Author

Mennea, P. L., primary, Calkins, B., additional, Metcalf, B. J., additional, Gerrits, T., additional, Lita, A. E., additional, Gates, J. C., additional, Kolthammer, W. S., additional, Spring, J. B., additional, Humphries, P. C., additional, Tomlin, N. A., additional, Fox, A. E., additional, Linares, A. Lamas, additional, Mirin, R. P., additional, Nam, S. W., additional, Walmsley, I. A., additional, and Smith, P. G. R., additional

Published
2013
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216. On-chip quantum teleportation

Author

Metcalf, B. J., primary, Thomas-Peter, N., additional, Spring, J. B., additional, Humphreys, P. C., additional, Langford, N. K., additional, Kolthammer, W. S., additional, Barbieri, M., additional, Jin, X. -M., additional, Smith, B., additional, Walmsley, I. A., additional, Gates, J. C., additional, Kundys, D., additional, and Smith, P. G. R., additional

Published
2013
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217. Enhancing Multiphoton Rates with Quantum Memories

Author

Nunn, J., primary, Langford, N. K., additional, Kolthammer, W. S., additional, Champion, T. F. M., additional, Sprague, M. R., additional, Michelberger, P. S., additional, Jin, X.-M., additional, England, D. G., additional, and Walmsley, I. A., additional

Published
2013
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218. Towards scalable photonics via quantum storage

Author

Nunn, J., primary, Langford, N. K., additional, Kolthammer, W. S., additional, Champion, T. F. M., additional, Sprague, M. R., additional, Michelberger, P. S., additional, Jin, X.-M., additional, England, D. G., additional, and Walmsley, I. A., additional

Published
2013
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219. Boson Sampling on a Photonic Chip

Author

Spring, J. B., primary, Metcalf, B. J., additional, Humphreys, P. C., additional, Kolthammer, W. S., additional, Jin, X.-M., additional, Barbieri, M., additional, Datta, A., additional, Thomas-Peter, N., additional, Langford, N. K., additional, Kundys, D., additional, Gates, J. C., additional, Smith, B. J., additional, Smith, P. G. R., additional, and Walmsley, I. A., additional

Published
2012
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220. Invited Review Article: Technology for Attosecond Science

Author

Frank, F., primary, Arrell, C., additional, Witting, T., additional, Okell, W. A., additional, McKenna, J., additional, Robinson, J. S., additional, Haworth, C. A., additional, Austin, D., additional, Teng, H., additional, Walmsley, I. A., additional, Marangos, J. P., additional, and Tisch, J. W. G., additional

Published
2012
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228. Integrated photonic sensing

Author

Thomas-Peter, N, primary, Langford, N K, additional, Datta, A, additional, Zhang, L, additional, Smith, B J, additional, Spring, J B, additional, Metcalf, B J, additional, Coldenstrodt-Ronge, H B, additional, Hu, M, additional, Nunn, J, additional, and Walmsley, I A, additional

Published
2011
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230. Dynamics of single-atom, single-photon trapping in cavity QED

Author

Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Lynn, T. W., Hood, C. J., Doherty, A. C., Birnbaum, K., Kimble, H. J., Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Lynn, T. W., Hood, C. J., Doherty, A. C., Birnbaum, K., and Kimble, H. J.

Abstract

Single atoms are trapped via strong coupling to single-photon fields in optical cavity QED. Properties of the atom-cavity interaction are explored through experimental observation of trapped-atom dynamics and lifetimes as trap parameters are systematically varied.

Published
2003

231. Cavity QED with Strong Coupling — Toward the Deterministic Control of Quantum Dynamics

Author

Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Kimble, H. J., Lynn, T. W., Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Kimble, H. J., and Lynn, T. W.

Abstract

Many of the current efforts to control the dynamics of individual quantum systems take place within the setting of cavity quantum electrodynamics (QED). The coupling of an atomic dipole to the mode of an optical resonator has historically produced important quantum effects in the regime of weak coupling between dipole and cavity mode; more recent experiments access the regime of strong coupling and begin to enable control of the quantum states of single atoms and single-photon fields through a coherent coupling that exceeds dissipative rates in the system. We briefly review the historical path to strong coupling and the variety of experiments involving single-quantum cavity QED. Current achievements and future challenges are illustrated through further discussion of two ongoing experiments in out group: one pursuing quantum feedback to trap single atoms in a cavity mode with single photons, the other building capability for quantum logic by using a FORT to hold atoms within a cavity mode. [Note that the presentation on which this paper is based can be accessed at http://www.its.caltech.edu/qoptics/cqed.html]

Published
2003

232. A Thumb-Nail Sketch of the Career of Professor Leonard Mandel

Author

Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Kimble, H. J., Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., and Kimble, H. J.

Abstract

As part of the Memorial Symposium at the Eight Rochester Conference on Coherence and Quantum Optics, this paper offers an overview of the remarkable career of Professor Leonard Mandel. The presentation upon which this paper is based can be accessed at http://www.its.caltech.edu/~qoptics/.

Published
2003

233. Leonard Mandel Symposium

Author

Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Kimble, H. J., Davidson, F., Bigelow, N. P., Eberly, J. H., Stroud, C. R., Walmsley, I. A., Kimble, H. J., and Davidson, F.

Abstract

Immediately following the Eighth Rochester Conference on Coherence and Quantum Optics, a symposium was held at the University of Rochester on Saturday the 16th of June 2001 in celebration of the life and career of Leonard Mandel. In the symposium, presentations were made by several of Professor Mandel’s former Ph. D. students. Here are the manuscripts that followed from these talks.

Published
2003

234. Quantum memory in an optical lattice

Author

Nunn, J., primary, Dorner, U., additional, Michelberger, P., additional, Reim, K. F., additional, Lee, K. C., additional, Langford, N. K., additional, Walmsley, I. A., additional, and Jaksch, D., additional

Published
2010
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236. Quantum memories

Author

Simon, C., primary, Afzelius, M., additional, Appel, J., additional, Boyer de la Giroday, A., additional, Dewhurst, S. J., additional, Gisin, N., additional, Hu, C. Y., additional, Jelezko, F., additional, Kröll, S., additional, Müller, J. H., additional, Nunn, J., additional, Polzik, E. S., additional, Rarity, J. G., additional, De Riedmatten, H., additional, Rosenfeld, W., additional, Shields, A. J., additional, Sköld, N., additional, Stevenson, R. M., additional, Thew, R., additional, Walmsley, I. A., additional, Weber, M. C., additional, Weinfurter, H., additional, Wrachtrup, J., additional, and Young, R. J., additional

Published
2010
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238. Towards high-speed optical quantum memories

Author

Reim, K. F., primary, Nunn, J., additional, Lorenz, V. O., additional, Sussman, B. J., additional, Lee, K. C., additional, Langford, N. K., additional, Jaksch, D., additional, and Walmsley, I. A., additional

Published
2010
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241. Applications of Raman Scattering in Quantum Technologies

Author

Reim, K. F., primary, Bustard, P., additional, Lee, K. C., additional, Nunn, J., additional, Lorenz, V. O., additional, Sussman, B. J., additional, Langford, N. K., additional, Jaksch, D., additional, Walmsley, I. A., additional, Champion, P. M., additional, and Ziegler, L. D., additional

Published
2010
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246. Full characterization of quantum optical detectors

Author

Coldenstrodt-Ronge, H. B., primary, Worsley, A. P., additional, Lundeen, J. S., additional, Feito, A., additional, Pregnell, K. L., additional, Silberhorn, Ch., additional, Mosley, P. J., additional, Smith, B. J., additional, Puentes, G., additional, Thomas-Peter, N., additional, Ralph, T. C., additional, Eisert, J., additional, Plenio, M. B., additional, and Walmsley, I. A., additional

Published
2009
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