arXiv:0805.1632 Abstract | arXiv Analytics

arXiv:0805.1632 [quant-ph]Abstract References Reviews Resources

Separability and Entanglement of Quantum States Based on Covariance Matrices

Published 2008-05-12Version 1

We investigate the separability of quantum states based on covariance matrices. Separability criteria are presented for multipartite states. The lower bound of concurrence proposed in Phys. Rev. A. 75, 052320 (2007) is improved by optimizing the local orthonormal observables.

Comments: 11 pages

Journal: J. Phys. A 41, Math. Theor.(2008)202002

DOI: 10.1088/1751-8113/41/20/202002

Categories: quant-ph

Keywords: quantum states, covariance matrices, entanglement, local orthonormal observables, multipartite states

Tags: journal article

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