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Title: Negativity of quasiprobability distributions as a measure of nonclassicality
Authors: Tan, Kok Chuan
Choi, Seongjeon
Jeong, Hyunseok
Keywords: Science::Physics
Issue Date: 2020
Source: Tan, K. C., Choi, S., & Jeong, H. (2020). Negativity of quasiprobability distributions as a measure of nonclassicality. Physical Review Letters, 124(11), 110404-. doi:10.1103/physrevlett.124.110404
Journal: Physical Review Letters 
Abstract: We demonstrate that the negative volume of any s-parametrized quasiprobability, including the Glauber-Sudashan P function, can be consistently defined and forms a continuous hierarchy of nonclassicality measures that are linear optical monotones. These measures belong to an operational resource theory of nonclassicality based on linear optical operations. The negativity of the Glauber-Sudashan P function, in particular, can be shown to have an operational interpretation as the robustness of nonclassicality. We then introduce an approximate linear optical monotone, and we show that this nonclassicality quantifier is computable and is able to identify the nonclassicality of nearly all nonclassical states.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.124.110404
Rights: © 2020 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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