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math-ph2010★ 29 cited
When different entanglement witnesses detect entangled states simultaneously
Jinchuan Hou, Yu Guo
The question under what conditions different witnesses may detect some entangled states simultaneously is answered for both finite- and infinite-dimensional bipartite systems. Fini…
math-ph2010★ 36 cited
Constructing entanglement witnesses for infinite-dimensional systems
Jinchuan Hou, Xiaofei Qi
It is shown that, every entangled state in an infinite-dimensional composite system has a simple entanglement witness of the form with a nonnegative number and a fin…