Possible entanglement detection with the naked eye

Brunner, Nicolas, Branciard, Cyril and Gisin, Nicolas (2008) Possible entanglement detection with the naked eye. Physical Review A - Atomic, Molecular, and Optical Physics, 78 5: 052110-1-052110-5. doi:10.1103/PhysRevA.78.052110

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Author Brunner, Nicolas
Branciard, Cyril
Gisin, Nicolas
Title Possible entanglement detection with the naked eye
Journal name Physical Review A - Atomic, Molecular, and Optical Physics   Check publisher's open access policy
ISSN 1050-2947
Publication date 2008-11
Sub-type Article (original research)
DOI 10.1103/PhysRevA.78.052110
Open Access Status File (Publisher version)
Volume 78
Issue 5
Start page 052110-1
End page 052110-5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract The human eye can detect optical signals containing only a few photons. We investigate the possibility to demonstrate entanglement with such biological detectors. While one person could not detect entanglement by simply observing photons, we discuss the possibility for several observers to demonstrate entanglement in a Bell-type experiment, in which standard detectors are replaced by human eyes. Using a toy model for biological detectors that captures their main characteristic, namely, a detection threshold, we show that Bell inequalities can be violated, thus demonstrating entanglement. Remarkably, when the response function of the detector is close to a step function, quantum nonlocality can be demonstrated without any further assumptions. For smoother response functions, as for the human eye, postselection is required.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article #052110

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 8 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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Created: Thu, 24 Mar 2011, 08:04:31 EST by Mr Cyril Branciard on behalf of Physics