Separable State Decompositions for a Class of Mixed States
Ting-Gui Zhang, Xiaofen Huang, Xianqing Li-Jost, Naihuan Jing, and Shao-Ming Fei
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Submission date: 07. Aug. 2013
published in: International journal of theoretical physics, 52 (2013), p. 4148-4154
DOI number (of the published article): 10.1007/s10773-013-1727-8
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We study certain quantum states for which the PPT criterion is both sufficient and necessary for separability. A class of n × n bipartite mixed states is presented and the conditions of PPT for these states are derived. The separable pure state decompositions of these states are explicitly constructed when they are PPT.