Lower bound of concurrence based on positive maps

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.034303· OSTI ID:21541401

Xiaosheng, Li ^[1]; Xiuhong, Gao ^[2]; Shaoming, Fei ^[2]

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1. Department of Mathematics, School of Science, South China University of Technology, Guangzhou 510640 (China)
2. School of Mathematical Sciences, Capital Normal University, Beijing 100048 (China)

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 positive partial transposition, realignment criteria, and Breuer's entanglement witness.

• OSTI ID: 21541401
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.034303; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOUND STATE
MANY-DIMENSIONAL CALCULATIONS
QUANTUM ENTANGLEMENT
QUANTUM STATES