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Enhancing the quantum state transfer between two atoms in separate cavities via weak measurement and its reversal

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Abstract

Taking the advantage of weak measurement and quantum measurement reversal, we propose a scheme to enhance the fidelity of transferring quantum state from one atom trapped in cavity to another distant one trapped in another cavity which is coupled by an optical fiber. It is turned out that the fidelity can be greatly improved even when the system is under serious dissipation. Moreover, the scheme works in both the strong-coupling and weak-coupling regimes. It is also robust to the ratio of the coupling constant between the atoms and the cavity modes to the coupling constant between the fiber and cavity modes. The underlying mechanism can be attributed to the probabilistic nature of weak measurements.

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Acknowledgements

This work is supported by the Funds of the National Natural Science Foundation of China under Grant Nos. 11665004 and 11365011, by the Natural Science Foundation of Jiangxi Province under Grant No. 20171BAB201019 and by the Scientific Research Foundation of Jiangxi Provincial Education Department under Grants Nos. GJJ150996 and GJJ150682. YL Li is also supported by the Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology.

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Authors and Affiliations

  1. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, Jiangxi, China

    Yan-Ling Li, Jinsong Huang & Zhonghui Xu

  2. College of Physics and Electronic Information, Gannan Normal University, Ganzhou, 341000, Jiangxi, China

    Xing Xiao

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  1. Yan-Ling Li
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  2. Jinsong Huang
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  3. Zhonghui Xu
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  4. Xing Xiao
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Correspondence to Xing Xiao.

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Li, YL., Huang, J., Xu, Z. et al. Enhancing the quantum state transfer between two atoms in separate cavities via weak measurement and its reversal. Quantum Inf Process 16, 258 (2017). https://doi.org/10.1007/s11128-017-1706-8

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  • DOI: https://doi.org/10.1007/s11128-017-1706-8

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