%0 Journal Article
%T Entanglement, detection, and geometry of non-classical States
%A Kisik Kim
%A Jaewan Kim
%A Joonwoo Bae
%J Physics
%D 2009
%I arXiv
%R 10.1103/PhysRevA.82.042105
%X Non-classical states that are characterized by their non-positive quasi-probabilities in phase space are known to be the basis for various quantum effects. In this work, we investigate the interrelation between the non-classicality and entanglement, and then characterize the non-classicality that precisely corresponds to entanglement. The results naturally follow from two findings: one is the general structure among non-classical, entangled, separable, and classical states over Hermitian operators, and the other a general scheme to detect non-classical states.
%U http://arxiv.org/abs/0903.0713v3