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.
(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).
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