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Entanglement concentration for arbitrary hybrid less-entangled state and W state using quantum dots and microcavity coupled system |
| Cao Cong (曹聪), Wang Chuan (王川), Zhang Ru (张茹 ) |
| School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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Abstract We propose a practical entanglement concentration protocol (ECP) for a hybrid entangled state using quantum dots and microcavity coupled system. A hybrid less-entangled state can be concentrated to a most-entangled state with a certain probability using only one ancillary single photon. Moreover, using this protocol, we can also concentrate arbitrary three-particle less-entangled W state using two ancillary photons and classical communication. The proposed protocols provide us with a useful method to concentrate less-entangled states, which can be implemented with current technology.
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Received: 03 May 2012
Revised: 14 May 2012
Accepted manuscript online:
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PACS:
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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78.67.Hc
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(Quantum dots)
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78.20.Ek
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(Optical activity)
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| Fund: Project supported by the National Fundamental Research Program of China (Grant No. 2010CB923202), the Specialized Research Fund for the Doctoral Program of Education Ministry of China (Grant No. 20090005120008), the Fundamental Research Funds for the Central Universities of China, and the National Natural Science Foundation of China (Grant Nos. 60937003, 61178010, and 61205117). |
Corresponding Authors:
Wang Chuan
E-mail: wangchuan82@gmail.com
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Cite this article:
Cao Cong (曹聪), Wang Chuan (王川), Zhang Ru (张茹 ) Entanglement concentration for arbitrary hybrid less-entangled state and W state using quantum dots and microcavity coupled system 2012 Chin. Phys. B 21 110305
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