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Relative Entropy of Entanglement of One Class of Two-Qubit system |
| LIANG Lin-Mei1,2;CHEN Ping-Xing1,2;LI Cheng-Zu2;HUANG Ming-Qiu2,3 |
| 1Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026
2Department of Applied Physics, National University of Defense Technology, Changsha 410073
3CCAST (World Laboratory) P.O. Box 8730, Beijing 100080 |
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| Cite this article: |
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LIANG Lin-Mei, CHEN Ping-Xing, LI Cheng-Zu et al 2001 Chin. Phys. Lett. 18 325-327 |
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Abstract 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 get the relative entropy of entanglement Ere for two-qubit systems. This paper 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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03.67.-a
03.65.Bz
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Published: 01 March 2001
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