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理论物理通讯：英文版

Canonical Form, and Separability of PPT States in C^2×C^2×C^2×C^N Composite Quantum Systems

FEIShao-Ming, GAOXiu-Hong, WANGXiao-Hong, WANGZhi-Xi, WUKe

Published Jan 1, 2003• 0 citations
OpenAlex

Abstract

We give a canonical form of PPT states in C2(×)C2(×)C2(×)CN with rank = N. From this canonical form a sufficient separability condition for these states is presented.

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We investigate the canonical forms of positive partial transposition (PPT) density matrices in C2⊗CM⊗CN{\cal C}^2 \otimes {\cal C}^M \otimes {\cal C}^NC2⊗CM⊗CN composite quantum systems with rank NNN. A general expression for these PPT states are explicitly obtained. From this canonical form a sufficient separability condition is presented.
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