Homodyne Estimation of Gaussian Quantum Discord

Blandino, Remi, Genoni, Marco G., Etesse, Jean, Barbieri, Marco, Paris, Matteo G. A., Grangier, Philippe and Tualle-Brouri, Rosa (2012) Homodyne Estimation of Gaussian Quantum Discord. Physical Review Letters, 109 18: . doi:10.1103/PhysRevLett.109.180402

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Author Blandino, Remi
Genoni, Marco G.
Etesse, Jean
Barbieri, Marco
Paris, Matteo G. A.
Grangier, Philippe
Tualle-Brouri, Rosa
Title Homodyne Estimation of Gaussian Quantum Discord
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
Publication date 2012-11
Year available 2012
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.109.180402
Open Access Status File (Publisher version)
Volume 109
Issue 18
Total pages 5
Place of publication College Park, MD United States
Publisher American Physical Society
Collection year 2012
Language eng
Formatted abstract
 We address the experimental estimation of Gaussian quantum discord for a two-mode squeezed thermal state, and demonstrate a measurement scheme based on a pair of homodyne detectors assisted by Bayesian analysis, which provides nearly optimal estimation for small value of discord. In addition, though homodyne detection is not optimal for Gaussian discord, the noise ratio to the ultimate quantum limit, as dictated by the quantum Cramer-Rao bound, is limited to about 10 dB.
Keyword States
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Citation counts: TR Web of Science Citation Count  Cited 32 times in Thomson Reuters Web of Science Article | Citations
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