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Chin. Phys. B, 2011, Vol. 20(11): 110305    DOI: 10.1088/1674-1056/20/11/110305
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Long-distance quantum state transfer through cavity-assisted interaction

Li Yu-Ning, Mei Feng, Yu Ya-Fei, Zhang Zhi-Ming
Laboratory of Photonic Information Technology and Laboratory of Quantum Information Technology, South China Normal University, Guangzhou 510006, China
Abstract  We propose a scheme for long-distance quantum state transfer between different atoms based on cavity-assisted interactions. In our scheme, a coherent optical pulse sequentially interacts with two distant atoms trapped in separated cavities. Through the measurement of the state of the first atom and the homodyne detection of the final output coherent light, the quantum state can be transferred into the second atom with a success probability of unity and a fidelity of unity. In addition, our scheme neither requires the high-Q cavity working in the strong coupling regime nor employs the single-photon quantum channel, which greatly relaxes the experimental requirements.
Keywords:  quantum state transfer      coherent optical pulse      homodyne detection  
Received:  11 April 2011      Revised:  25 May 2011      Published:  15 November 2011
PACS:  03.67.Hk (Quantum communication)  
  05.60.Gg (Quantum transport)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 60978009) and the National Basic Research Program of China (Grant Nos. 2009CB929604 and 2007CB925204).

Cite this article: 

Li Yu-Ning, Mei Feng, Yu Ya-Fei, Zhang Zhi-Ming Long-distance quantum state transfer through cavity-assisted interaction 2011 Chin. Phys. B 20 110305

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