Canonical Form and Separability of PPT States in 2xMxN Composite Quantum Systems
X. H. Wang, S. M. Fei, Z. X. Wang, K. Wu
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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