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Chin. Phys. B, 2021, Vol. 30(3): 034204    DOI: 10.1088/1674-1056/abd38c

Bidirectional highly-efficient quantum routing in a T-bulge-shaped waveguide

Jia-Hao Zhang(张家豪)1,†, Da-Yong He(何大永)1, Gang-Yin Luo(罗刚银)1, Bi-Dou Wang(王弼陡)1, and Jin-Song Huang(黄劲松)2,
1 Engineering Industrialization Research Center, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215011, China; 2 School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Abstract  Quantum routing in a T-bulge-shaped waveguide system coupled with a driven cyclic three-level atom and a two-level atom is investigated theoretically. By employing the discrete-coordinate scattering method, exact expressions of the transport coefficients along three ports of the waveguide channels are derived. Our results show that bidirectional high transfer-rate single-photon routing between two channels can be effectively implemented, with the help of the effective potential generated by two atoms and the external driving. Moreover, multiple band zero-transmission emerges in the scattering spectra, arising from the quantum interferences among photons scattered by the boundary and the bulged resonators. The proposed system may suggest an efficient duplex router with filtering functions.
Keywords:  scattering theory      optical waveguide      quantum routing  
Received:  18 August 2020      Revised:  10 October 2020      Accepted manuscript online:  15 December 2020
PACS:  42.50.Ex (Optical implementations of quantum information processing and transfer)  
  42.79.Gn (Optical waveguides and couplers)  
  03.67.Lx (Quantum computation architectures and implementations)  
  78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)  
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFC0110403) and the Scientific Research Foundation of the Jiangxi Provincial Education Department, China (Grant No. GJJ180424).
Corresponding Authors:  Corresponding author. E-mail: Corresponding author. E-mail:   

Cite this article: 

Jia-Hao Zhang(张家豪), Da-Yong He(何大永), Gang-Yin Luo(罗刚银), Bi-Dou Wang(王弼陡), and Jin-Song Huang(黄劲松) Bidirectional highly-efficient quantum routing in a T-bulge-shaped waveguide 2021 Chin. Phys. B 30 034204

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