Detection of continuous variable entanglement without coherent local oscillators

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Title Detection of continuous variable entanglement without coherent local oscillators
Author Ferris, Andrew J.; Olsen, Murray K.; Cavalcanti, Eric Gama; Davis, Matthew J.
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Editor Gordon W.F. Drake, Margaret Malloy
Year Published 2008
Place of publication United States
Publisher American Physical Society
Abstract We propose three criteria for identifying continuous variable entanglement between two many-particle systems with no restrictions on the quantum state of the local oscillators used in the measurements. Mistakenly asserting a coherent state for the local oscillator can lead to incorrectly identifying the presence of entanglement. We demonstrate this in simulations with 100 particles and also find that large number fluctuations do not prevent the observation of entanglement. Our results are important for quantum information experiments with realistic Bose-Einstein condensates or in optics with arbitrary photon states.
Peer Reviewed Yes
Published Yes
Publisher URI http://pra.aps.org/
Alternative URI http://dx.doi.org/10.1103/PhysRevA.78.060104
Copyright Statement Copyright 2008 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal link for access to the definitive, published version.
Volume 78
Issue Number 6
Page from 060104-1
Page to 060104-4
ISSN 1050-2947
Date Accessioned 2009-01-13
Date Available 2009-05-21T06:19:45Z
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Quantum Optics and Lasers
URI http://hdl.handle.net/10072/22507
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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