On PPT States in KxMxN Composite Quantum Systems

Abstract

We study the general representations of positive partial transpose (PPT) states in ${\mathcal{C}}^K\otimes {\mathcal{C}}^M\otimes {\mathcal{C}}^N$. For the PPT states with rank-$N$ a canonical form is obtained, from which a sufficient separability condition is presented.

13 pages