Long-distance quantum state transfer through cavity-assisted interaction

doi:10.1088/1674-1056/20/11/110305

中国物理B ›› 2011, Vol. 20 ›› Issue (11): 110305-110305.doi: 10.1088/1674-1056/20/11/110305

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Long-distance quantum state transfer through cavity-assisted interaction

李宇宁, 梅锋, 於亚飞, 张智明

Laboratory of Photonic Information Technology and Laboratory of Quantum Information Technology, South China Normal University, Guangzhou 510006, China

收稿日期:2011-04-11 修回日期:2011-05-25 出版日期:2011-11-15 发布日期:2011-11-15
基金资助:
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).

Long-distance quantum state transfer through cavity-assisted interaction

Li Yu-Ning(李宇宁), Mei Feng(梅锋), Yu Ya-Fei(於亚飞)^†, and Zhang Zhi-Ming(张智明)^‡

Laboratory of Photonic Information Technology and Laboratory of Quantum Information Technology, South China Normal University, Guangzhou 510006, China

Received:2011-04-11 Revised:2011-05-25 Online:2011-11-15 Published:2011-11-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

Key words: quantum state transfer, coherent optical pulse, homodyne detection

中图分类号: (Quantum communication)

03.67.Hk

05.60.Gg (Quantum transport)

李宇宁, 梅锋, 於亚飞, 张智明. Long-distance quantum state transfer through cavity-assisted interaction[J]. 中国物理B, 2011, 20(11): 110305-110305.

Li Yu-Ning(李宇宁), Mei Feng(梅锋), Yu Ya-Fei(於亚飞), and Zhang Zhi-Ming(张智明) . Long-distance quantum state transfer through cavity-assisted interaction[J]. Chin. Phys. B, 2011, 20(11): 110305-110305.

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Long-distance quantum state transfer through cavity-assisted interaction

Long-distance quantum state transfer through cavity-assisted interaction

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