Separability Criteria and Lower Bound for Concurrence Based on Hermitian Maps
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In this paper, a class of matrix maps be preserving Hermitian are constructed. Based on these maps, for pure quantum states on any finite dimensional bipartite systems, we present a necessary and sufficient condition for separability, moreover, a new lower bound of concurrence is obtained.
KeywordsQuantum states Entanglement Concurrence
This project is supported by China Postdoctoral Science Foundation (2014M551655) and Natural Science Foundation of Jiangsu Province of China (BK20130325).