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arXiv · 1010.2078

Detecting entanglement of states by entries of their density matrices

Xiaofei Qi·Jinchuan Hou
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Abstract

For any bipartite systems, a universal entanglement witness of rank-4 for pure states is obtained and a class of finite rank entanglement witnesses is constructed. In addition, a method of detecting entanglement of a state only by entries of its density matrix with respect to some product basis is obtained.

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Xiaofei Qi, Jinchuan Hou. 2010-10-22. Detecting entanglement of states by entries of their density matrices. https://arxiv.org/abs/1010.2078

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