Controllable Scattering of a Single Photon inside a One-Dimensional Resonator Waveguide
Lan Zhou, Z. R. Gong, Yu-xi Liu, C. P. Sun, Franco Nori · Physical Review Letters · 2008
We analyze the coherent transport of a single photon, which propagates in a one-dimensional coupled-resonator waveguide and is scattered by a controllable two-level system located inside one of the resonators of this waveguide. Our approach, which uses discrete coordinates, unifies low and high energy effective theories for single-photon scattering. We show that the controllable two-level system can behave as a quantum switch for the coherent transport of a single photon. This study may inspire new electro-optical single-photon quantum devices. We also suggest an experimental setup based on superconducting transmission line resonators and qubits.