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Information-holding quantum router of single photons using natural atom

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Abstract

In a quantum network, a quantum router can play a key role that involves exchanging quantum information (quantum states) among different parties. In this paper, we propose a single-photon quantum router by using a four-level atom that is embedded in quantum multi-channels, which are composed of coupled-resonator waveguides. Single photons can be guided from one quantum channel to another by controlling an on-demand classical field. The fidelity of the routing atom recovers to a maximum after a time evolution cycle of the system; thus, the fidelity of the information-carrying single photon reaches unit at the same time. For the first time, we demonstrate that quantum information carried by single photons can be perfectly held after a quantum router.

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Authors and Affiliations

  1. Department of Applied Physics, East China Jiaotong University, Nanchang, 330013, P.R. China

    Guo-An Yan & Ai-Xi Chen

  2. State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, P.R. China

    Guo-An Yan & Qing-Yu Cai

  3. Institute for Quantum Computing, University of Waterloo, Ontario, N2L 3G1, Canada

    Ai-Xi Chen

Authors
  1. Guo-An Yan
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  2. Qing-Yu Cai
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  3. Ai-Xi Chen
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Correspondence to Ai-Xi Chen.

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Yan, GA., Cai, QY. & Chen, AX. Information-holding quantum router of single photons using natural atom. Eur. Phys. J. D 70, 93 (2016). https://doi.org/10.1140/epjd/e2016-60724-6

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  • DOI: https://doi.org/10.1140/epjd/e2016-60724-6

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