Lewenstein-Sanpera Decomposition for $2\otimes 2$ Systems

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dc.creatorAkhtarshenas, S. J.
dc.creatorJafarizadeh, M. A.
dc.date2002-09-05
dc.date.accessioned2026-07-07T06:04:53Z
dc.date.available2026-07-07T06:04:53Z
dc.descriptionAs it is well known, every bipartite $2\otimes 2$ density matrix can be obtained from Bell decomposable states via local quantum operations and classical communications (LQCC). Using this fact, the Lewenstein-Sanpera decomposition of an arbitrary bipartite $2\otimes 2$ density matrix has been obtained through LQCC action upon Lewenstein-Sanpera decomposition of Bell decomposable states of $2\otimes 2$ quantum systems, where the product states introduced by Wootters in [W. K. Wootters, Phys. Rev. Lett. {\bf 80} 2245 (1998)] form the best separable approximation ensemble for Bell decomposable states. It is shown that in these systems the average concurrence of the Lewenstein-Sanpera decomposition is equal to the concurrence of these states.
dc.description17 pages, Latex
dc.identifierhttps://arxiv.org/abs/quant-ph/0209045
dc.identifierhttp://arxiv.org/abs/quant-ph/0209045
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/90471
dc.subjectQuantum Physics
dc.titleLewenstein-Sanpera Decomposition for $2\otimes 2$ Systems
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