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Control of single-photon routing in a T-shaped waveguide by another atom

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Abstract

Quantum routers with a high routing rate of much more than 0.5 are of great importance for quantum networks. We provide a scheme to perform bidirectional high routing-rate transfer in a T-shaped coupled-resonator waveguide (CRW), which extends a recent unidirectional scheme proposed by Lu et al. (Opt Express 23:22955, 2015). By locating an extra two-level atom in the infinite CRW channel of the T-shaped CRW with a three-level system, an effective potential is generated. Our numerical results show that high routing capability from the infinite CRW channel to the semi-infinite channel can be achieved, and routing capability from the semi-infinite CRW channel to the infinite channel can also be significantly enhanced, with the help of the effective potential. Therefore, the proposed double-atom configuration could be utilized as a bidirectional quantum routing controller to implement high transfer rate routing of single photons.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11247032, 11365011), by the Natural Science Foundation of Jiangxi (Grant No. 20151BAB202012), and by the Scientific Research Foundation of Jiangxi University of Science and Technology (Grant No. NSFJ2014-K18).

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Authors and Affiliations

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

    Jin-Song Huang, Jing-Wen Wang, Yan-Ling Li & You-Wen Huang

  2. School of Foreign Studies, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    Yan Wang

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  1. Jin-Song Huang
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Correspondence to Jin-Song Huang.

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Huang, JS., Wang, JW., Wang, Y. et al. Control of single-photon routing in a T-shaped waveguide by another atom. Quantum Inf Process 17, 78 (2018). https://doi.org/10.1007/s11128-018-1850-9

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