Abstract
We investigate quantum routing in a multi-T-shaped waveguide coupled to driven cyclic three-level systems. Exact expressions of the scattering coefficients for the double-T and triple-T waveguides are obtained by employing the discrete-coordinate scattering and the transfer matrix approach, respectively. Our results show that high transfer-rate routing of single photons from the input infinite channel to the other channels can be effectively implemented in the extended multi-T configuration, in contrast with the single-T waveguide with the transfer of no more than 0.5. The proposed router may be utilized as a scalable quantum device to control single-photon routing.
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