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MiS Preprint
59/2011

Lower Bound of Concurrence and Distillation for Arbitrary Dimensional Bipartite Quantum States

Ming-Jing Zhao, Xue-Na Zhu, Shao-Ming Fei and Xianqing Li-Jost

Abstract

We present an analytical lower bound of concurrence for arbitrary dimensional bipartite quantum states. This lower bound may be used to improve all the known lower bounds of concurrence. Moreover, the lower bound gives rise to an operational sufficient criterion of distillability of quantum entanglement. The significance of our result is illustrated by quantitative evaluation of entanglement for entangled states that fail to be identified by the usual concurrence estimation method, and by showing the distillability of mixed states that can not be recognized by other distillability criteria.

Received:
Sep 3, 2011
Published:
Sep 5, 2011
PACS:
03.67.Mn, 03.65.Ud

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inJournal
2011 Repository Open Access
Ming-Jing Zhao, Xue-Na Zhu, Shao-Ming Fei and Xianqing Li-Jost

Lower bound of concurrence and distillation for arbitrary dimensional bipartite quantum states

In: Physical review / A, 84 (2011) 6, p. 062322