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Dense Coding with Multi-Atom Entanglement Channel in Cavity QED |
| WANG Xin-Wen1;LIU Xiang2;WANG Zhi-Yong3 |
| 1Department of Electronic Engineering and Physics, Hunan University of Science and Engineering, Yongzhou 4251000
2College of Physics and Information Science, Hunan Normal University, Changsha
3Department of Physics, Hengyang Normal University, Hengyang 421008 |
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| Cite this article: |
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WANG Xin-Wen, LIU Xiang, WANG Zhi-Yong 2007 Chin. Phys. Lett. 24 11-14 |
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Abstract Dense coding of multi-atom entangled states in cavity QED is studied. If the quantum channel is generalized GHZ states, dense coding can be directly realized in a simply way. As for the partially entangled pure states, we propose a feasible protocol for entanglement concentration, and the efficiency of information transmitted is calculated. The schemes are insensitive to the cavity decay and the field state, due to the fact that the interaction here is a large-detuned one between atoms and the cavity.
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03.67.Hk
42.50.-p
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Published: 01 January 2007
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