Lower Bound of Concurrence Based on Positive Maps
Quantum Physics
2011-04-07 v1
Abstract
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.
Cite
@article{arxiv.1104.1000,
title = {Lower Bound of Concurrence Based on Positive Maps},
author = {Xiao-Sheng Li and Xiu-Hong Gao and Shao-Ming Fei},
journal= {arXiv preprint arXiv:1104.1000},
year = {2011}
}
Comments
8 pages, 1 figure