2013/10/31 by Jing Lu, Lan Zhou, Le‐Man Kuang +2
Computer Science · Physics and Astronomy · #Amplitude damping channel #Channel (broadcasting) #Coherent control #Computer science #Mechanical and Optical Resonators #Photon #Photonics #Physics #Quantum #Quantum Information and Cryptography #Quantum channel #Quantum information #Quantum mechanics #Quantum network #Quantum optics #Quantum optics and atomic interactions #Telecommunications #quant-ph
paper · pdf · doi:10.1103/physreva.89.013805
published as Phys. Rev. A 89, 013805 (2014) · 9 pages, 8 figures
openalex publication_date 2014/01/07 · arxiv created 2014/01/11 · arxiv updated 2014/01/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a single-photon router using a single atom with an inversion center coupled to quantum multichannels made of coupled-resonator waveguides. We show that the spontaneous emission of the atom can direct single photons from one quantum channel into another. The on-demand classical field perfectly switches off the single-photon routing due to the quantum interference in the atomic amplitudes of optical transitions. Total reflections in the incident channel are due to the photonic bound state in the continuum. Two virtual channels, named the scatter-free and controllable channels, are found, which are coherent superpositions of quantum channels. Any incident photon in the scatter-free channel is totally transmitted. The propagating states of the controllable channel are orthogonal to those of the scatter-free channel. Single photons in the controllable channel can be perfectly reflected or transmitted by the atom.