Controllable scattering of photons inside a one-dimensional resonator waveguide

TL;DR

This paper investigates how a controllable two-level system within a one-dimensional resonator waveguide can manipulate photon transport, potentially enabling quantum switching and advancing single-photon quantum device technology.

Contribution

It introduces a unified theoretical approach for single-photon scattering and demonstrates the two-level system's role as a controllable quantum switch.

Findings

Two-level system can control photon transmission

Unified discrete coordinate approach for scattering analysis

Potential for new quantum electro-optical devices

Abstract

We analyze coherent transport of photons, which propagate in a one-dimensional coupled-resonator waveguide (CRW) and are scattered by a controllable two-level system located inside the CRW. 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 photons. 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