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Explicit Protocol for Deterministic Entanglement Concentration |
| GU Yong-Jian1;GAO Peng1;GUO Guang-Can2 |
| 1Department of Physics, Ocean University of China, Qingdao 266071
2Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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GU Yong-Jian, GAO Peng, GUO Guang-Can 2005 Chin. Phys. Lett. 22 1592-1595 |
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Abstract We present an explicit protocol for extraction of an EPR pair from two partially entangled pairs in a deterministic fashion via local operations and classical communication. This protocol is constituted by a local measurement described by a positive operator-valued measure (POVM), one-way classical communication, and a corresponding local unitary operation or a choice between the two pairs. We explicitly construct the required POVM by the analysis of the doubly stochastic matrix connecting the initial and the final states. Our scheme might be useful in future quantum communication.
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| Keywords:
03.67.Hk
03.67.Mn
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Published: 01 July 2005
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| PACS: |
03.67.Hk
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(Quantum communication)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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