Detection of continuous variable entanglement without coherent local oscillators

Ferris, Andrew J., Olsen, Murray K., Cavalcanti, Eric G. and Davis, Matthew J. (2008) Detection of continuous variable entanglement without coherent local oscillators. Physical Review A (Atomic, Molecular and Optical Physics), 78 6: 060104-1-060104-4. doi:10.1103/PhysRevA.78.060104

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Author Ferris, Andrew J.
Olsen, Murray K.
Cavalcanti, Eric G.
Davis, Matthew J.
Title Detection of continuous variable entanglement without coherent local oscillators
Journal name Physical Review A (Atomic, Molecular and Optical Physics)   Check publisher's open access policy
ISSN 1050-2947
Publication date 2008-12-31
Year available 2008
Sub-type Article (original research)
DOI 10.1103/PhysRevA.78.060104
Open Access Status File (Publisher version)
Volume 78
Issue 6
Start page 060104-1
End page 060104-4
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physcial Society
Language eng
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.
Keyword Bose-Einstein condensation
Quantum entanglement
Quantum optics
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID FF0458313
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 30 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 31 times in Scopus Article | Citations
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Created: Tue, 14 Apr 2009, 21:31:24 EST by Stephanie Golding on behalf of ARC Centre of Excellence for Quantum-Atom Optics