Relative Entropy of Entanglement of One Class of Two-Qubit System

LIANG Lin-Mei; CHEN Ping-Xing; LI Cheng-Zu; HUANG Ming-Qiu

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Relative Entropy of Entanglement of One Class of Two-Qubit System

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The relative entropy of entanglement of a mixed state σ for a bipartite quantum system can be defined as the minimum of the quantum relative entropy over the set of completely disentangled states. Vedral et al. [Phys.Rev. A 57(1998)1619] have recently proposed a numerical method to obtain the relative entropy of entanglement Ere for two-qubit systems. This letter shows that the convex programming method can be applied to calculate Ere of two-qubit systems analytically, and discusses the conditions under which the method can be adopted.

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《中国物理快报：英文版》 |2001年第3期|325-327|共3页
作者
LIANG Lin-Mei; CHEN Ping-Xing; LI Cheng-Zu; HUANG Ming-Qiu;
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Laboratory of Quantum Communication and Quantum Computation,University of Science and Technology of China, Hefei 230026rnDepartment of Applied Physics, National University of Defense Technology, Changsha 410073;

Laboratory of Quantum Communication and Quantum Computation,University of Science and Technology of China, Hefei 230026rnDepartment of Applied Physics, National University of Defense Technology, Changsha 410073;

Department of Applied Physics, National University of Defense Technology, Changsha 410073;

Department of Applied Physics, National University of Defense Technology, Changsha 410073rnCCAST (World Laboratory) P.O. Box 8730, Beijing 100080;

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Relative Entropy of Entanglement of One Class of Two-Qubit System

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