Lower Bound of Concurrence Based on Positive Maps

Details Lower Bound of Concurrence Based on Positive Maps Lower Bound of Concurrence Based on Positive Maps

2011-04-06

arxiv.org/abs/1104.1000v1

Phys. Rev. A 83 (2011) 034303

Physics

Quantum Physics

8 pages, 1 figure

Scientific paper

10.1103/PhysRevA.83.034303

We study the concurrence of arbitrary dimensional bipartite quantum systems.
An explicit analytical lower bound of concurrence is obtained, which detects
entanglement for some quantum states better than some well-known separability
criteria, and improves the lower bounds such as from the PPT, realignment
criteria and the Breuer's entanglement witness.

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