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Phys. Rev. A 63, 052306 (2001) [5 pages]

Necessary and sufficient condition of separability of any system

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Ping-Xing Chen and Lin-Mei Liang*
Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei, 230026, People’s Republic of China
Department of Applied Physics, National University of Defense Technology, Changsha, 410073, People’s Republic of China

Cheng-Zu Li
Department of Applied Physics, National University of Defense Technology, Changsha, 410073, People’s Republic of China

Ming-Qiu Huang
CCAST (World Laboratory) P.O. Box 8730, Beijing, 100080, China
Department of Applied Physics, National University of Defense Technology, Changsha, 410073, People’s Republic of China

Received 18 August 2000; revised 24 October 2000; published 16 April 2001

The necessary and sufficient condition of the separability of a mixed state of any system is presented, which is practical in judging the separability of a mixed state. This paper also presents a method of finding the disentangled decomposition of a separable mixed state.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.63.052306
DOI:
10.1103/PhysRevA.63.052306
PACS:
03.67.-a, 03.65.Ta

*Corresponding address.

 
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