Higher dimensional bipartite composite systems with the same density matrix: separable, free entangled, or PPT entangled?

Wei Cheng, Fang Xu, Hua Li, Gang Wang. Higher dimensional bipartite composite systems with the same density matrix: separable, free entangled, or PPT entangled?. Quantum Information Processing, 13(4):849-862, 2014. [doi]

Abstract

Abstract is missing.