Detecting the concurrence of an unknown state with a single observable

Details Detecting the concurrence of an unknown state with a single observable Detecting the concurrence of an unknown state with a single observable

2011-04-06

arxiv.org/abs/1104.1006v1

Physics

Quantum Physics

Scientific paper

While the detection of entanglement has been proved already to be quite a difficult task, experimental quantification of entanglement is even more challenging. In this work, we derive an analytical lower bound for the concurrence of a bipartite mix quantum state in arbitrary dimension. The lower bound is experimentally implementable in a feasible way, which enabling quantification of entanglement in a broad variety of cases

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