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Bragg spectroscopic interferometer and quantum measurement-induced correlations in atomic Bose-Einstein condensates

Bragg spectroscopic interferometer and quantum measurement-induced correlations in atomic Bose-Einstein condensates
Bragg spectroscopic interferometer and quantum measurement-induced correlations in atomic Bose-Einstein condensates
We theoretically analyze the Bragg spectroscopic interferometer of two spatially separated atomic Bose-Einstein condensates that was experimentally realized by Saba et al. [Science 2005 307 p1945]. Although the relative phase evolution is continuously monitored by light-stimulated Bragg scattering of intense laser beams, we show that the phase is created by quantum measurement-induced back-action on the homodyne photo-current of the lasers,
opening possibilities for quantum-enhanced interferometric schemes. We identify two regimes of phase evolution: a running phase regime, that is sensitive to an energy offset and suitable for an interferometer, and a trapped phase regime, that can be insensitive to applied forces and detrimental to interferometric applications.
quantum gases, liquids and solids, quantum information and quantum mechanics
073057-[13pp]
Lee, M.D.
c99e32c7-e47e-46ac-8a24-aecd437fc5f1
Rist, S.
535c5d54-684c-496d-931e-07de43ec07dc
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Lee, M.D.
c99e32c7-e47e-46ac-8a24-aecd437fc5f1
Rist, S.
535c5d54-684c-496d-931e-07de43ec07dc
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4

Lee, M.D., Rist, S. and Ruostekoski, J. (2012) Bragg spectroscopic interferometer and quantum measurement-induced correlations in atomic Bose-Einstein condensates. New Journal of Physics, 14 (73057), 073057-[13pp]. (doi:10.1088/1367-2630/14/7/073057).

Record type: Article

Abstract

We theoretically analyze the Bragg spectroscopic interferometer of two spatially separated atomic Bose-Einstein condensates that was experimentally realized by Saba et al. [Science 2005 307 p1945]. Although the relative phase evolution is continuously monitored by light-stimulated Bragg scattering of intense laser beams, we show that the phase is created by quantum measurement-induced back-action on the homodyne photo-current of the lasers,
opening possibilities for quantum-enhanced interferometric schemes. We identify two regimes of phase evolution: a running phase regime, that is sensitive to an energy offset and suitable for an interferometer, and a trapped phase regime, that can be insensitive to applied forces and detrimental to interferometric applications.

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More information

Submitted date: 20 April 2012
e-pub ahead of print date: 20 April 2012
Published date: July 2012
Keywords: quantum gases, liquids and solids, quantum information and quantum mechanics
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 338319
URI: http://eprints.soton.ac.uk/id/eprint/338319
PURE UUID: d3c8e024-ebbc-496b-8137-940a4d7c1575

Catalogue record

Date deposited: 15 May 2012 16:05
Last modified: 08 Nov 2021 22:46

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Contributors

Author: M.D. Lee
Author: S. Rist
Author: J. Ruostekoski

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