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Phys. Rev. A 74, 050306(R) (2006) [4 pages]

When non-Gaussian states are Gaussian: Generalization of nonseparability criterion for continuous variables

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Derek McHugh1, Vladimír Bužek1,2, and Mário Ziman1,2,3
1Research Center for Quantum Information, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia
2Quniverse, Líščie údolie 116, 841 04 Bratislava, Slovakia
3Faculty of Informatics, Masaryk University, Botanická 68a, 60200 Brno, Czech Republic

Received 2 November 2006; revised 15 November 2006; published 30 November 2006

We present a class of non-Gaussian two-mode continuous-variable states for which the separability criterion for Gaussian states can be employed to detect whether they are separable or not. These states reduce to the two-mode Gaussian states as a special case.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.74.050306
DOI:
10.1103/PhysRevA.74.050306
PACS:
03.67.Mn
 
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