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MiS Preprint

Lower Bound of Concurrence Based on Positive Maps

Xiao-Sheng Li, Xiu-Hong Gao and Shao-Ming Fei


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.

Sep 3, 2011
Sep 5, 2011
03.67.Mn, 03.67.-a, 02.20.Hj, 03.65.-w

Related publications

2011 Repository Open Access
Xiao-Sheng Li, Xiu-Hong Gao and Shao-Ming Fei

Lower bound of concurrence based on positive maps

In: Physical review / A, 83 (2011) 3, pp. 034303-034303