Preprint 57/2011

Lower Bound of Concurrence Based on Positive Maps

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

Contact the author: Please use for correspondence this email.
Submission date: 03. Sep. 2011
Pages: 10
published in: Physical review / A, 83 (2011) 3, p. 034303 
DOI number (of the published article): 10.1103/PhysRevA.83.034303
PACS-Numbers: 03.67.Mn, 03.67.-a, 02.20.Hj, 03.65.-w
Download full preprint: PDF (144 kB)

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.

07.10.2017, 01:42