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We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint
57/2011

Lower Bound of Concurrence Based on Positive Maps

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

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.

Received:
03.09.11
Published:
05.09.11
PACS:
03.67.Mn, 03.67.-a, 02.20.Hj, 03.65.-w

Related publications

inJournal
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