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Scheme for purifying a general mixed entangled state and its linear optical implementation |
| Dong Dong (董冬), Zhang Yan-Lei (张延磊), Zou Chang-Ling (邹长铃), Zou Xu-Bo (邹旭波), Guo Guang-Can (郭光灿) |
| Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China |
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Abstract We propose a scheme for purification of a general mixed entangled state. In this scheme, we start from a large number of general mixed entangled states and end up, after local operation and classical communication, with a smaller number of Bell diagonal states with higher entanglement. In particular, the scheme can purify one maximally entangled state from two entangled pairs prepared in a class of mixed entangled state. Furthermore we propose a linear optical implementation of the present scheme with polarization beam splitters and photon detectors.
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Received: 24 March 2015
Revised: 18 June 2015
Accepted manuscript online:
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PACS:
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03.67.-a
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(Quantum information)
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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42.50.-p
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(Quantum optics)
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Corresponding Authors:
Zou Xu-Bo
E-mail: xbz@ustc.edu.cn
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Cite this article:
Dong Dong (董冬), Zhang Yan-Lei (张延磊), Zou Chang-Ling (邹长铃), Zou Xu-Bo (邹旭波), Guo Guang-Can (郭光灿) Scheme for purifying a general mixed entangled state and its linear optical implementation 2015 Chin. Phys. B 24 100306
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