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Computable Measure of Nonclassicality for Light

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Asbóth, János K., Calsamiglia, John, Ritsch, Helmut·2005·Physical Review Letters

Abstract

We propose the entanglement potential (EP) as a measure of nonclassicality for quantum states of a single-mode electromagnetic field. It is the amount of two-mode entanglement that can be generated from the field using linear optics, auxiliary classical states, and ideal photodetectors. The EP detects nonclassicality, has a direct physical interpretation, and can be computed efficiently. These three properties together make it stand out from previously proposed nonclassicality measures. We derive closed expressions for the EP of important classes of states and analyze as an example of the degradation of nonclassicality in lossy channels.

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Metadata

Authors
Asbóth, J. K., Calsamiglia, J., & Ritsch, H.
Venue
Physical Review Letters
Published
2005-05-05
Volume
94
Issue
17
Pages
173602-173602
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2055970137
Cited by
323
References
35
FWCI
4.81
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Computable Measure of Nonclassicality for Light. https://app.cochat.ai/papers/10.1103/physrevlett.94.173602
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Asbóth, J. K., Calsamiglia, J., & Ritsch, H. (2005). Computable Measure of Nonclassicality for Light. Physical Review Letters. https://doi.org/10.1103/physrevlett.94.173602

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