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Chin. Phys. B, 2008, Vol. 17(8): 2969-2972    DOI: 10.1088/1674-1056/17/8/034
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Purification of entangled states for two atoms via cavity decay

Zheng Shi-Biao(郑仕标)
Department of Electronic Science and Applied Physics Fuzhou University, Fuzhou 350002, China
Abstract  In this paper a scheme is proposed for the purification of entangled states for two atoms trapped in two distant cavities via cavity decay. In the scheme, the atoms have no probability of being populated in the excited state and thus the atomic spontaneous emission is suppressed. This scheme is valid no matter when the cavity decay rate is larger or smaller than the effective atom-cavity coupling strength. The fidelity of the final state is not affected by the imperfection of the photodetectors.
Keywords:  purification      entangled state      cavity decay  
Received:  29 October 2007      Revised:  18 December 2007      Accepted manuscript online: 
PACS:  42.50.Dv (Quantum state engineering and measurements)  
  03.65.Ud (Entanglement and quantum nonlocality)  
  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10674025) and funds from Fuzhou University.

Cite this article: 

Zheng Shi-Biao(郑仕标) Purification of entangled states for two atoms via cavity decay 2008 Chin. Phys. B 17 2969

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