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Canonical Form and Separability of PPT States in 2xMxN Composite Quantum Systems

X. H. Wang, S. M. Fei, Z. X. Wang, K. Wu

quant-pharXiv:quant-ph/0312031

Abstract

We investigate the canonical forms of positive partial transposition (PPT) density matrices in C2 CM CN composite quantum systems with rank N. A general expression for these PPT states are explicitly obtained. From this canonical form a sufficient separability condition is presented.

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