Nonclassicality in phase space and nonclassical correlation

Petr Marek, M. S. Kim, Jinhyoung Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Continuous-variable entanglement is a manifestation of nonclassicality of quantum states. In this paper, we attempt to analyze whether and under which conditions nonclassicality can be used as an entanglement criterion. We adopt the well-accepted definition of nonclassicality in the form of lack of well-defined positive Glauber-Sudarshan P function describing the state. After demonstrating that the classicality of subsystems is not sufficient for the nonclassicality of the overall state to be identifiable with entanglement, we focus on Gaussian states and find specific local unitary transformations required to arrive at this equivalency. This is followed by the analysis of quantitative relation between nonclassicality and entanglement.

Original languageEnglish
Article number052315
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume79
Issue number5
DOIs
StatePublished - 2009 May 1

Cite this

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Nonclassicality in phase space and nonclassical correlation. / Marek, Petr; Kim, M. S.; Lee, Jinhyoung.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 79, No. 5, 052315, 01.05.2009.

Research output: Contribution to journalArticle

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