Transferring and bounding single photon in waveguide controlled by quantum node based on atomic ensemble

TL;DR

This paper explores a quantum node based on atomic ensembles in a waveguide, demonstrating controlled single-photon transfer and localization, with exact solutions and potential for quantum information applications.

Contribution

It introduces an atomic ensemble-based quantum node for controlling single-photon transfer in a waveguide, with exact scattering solutions and analysis of photon localization.

Findings

Transmission coefficients can be precisely controlled and vanish at resonance.

Existence of two bound states for photon localization.

Simulation of waveguide as coupled resonator array at high energy limit.

Abstract

We study the scattering process of photons confined in a one dimensional optical waveguide by a laser controlled atomic ensemble. The investigation leads to an alternative setup of quantum node controlling the coherent transfer of single photon in such one dimensional continuum. To exactly solve the effective scattering equations by using the discrete coordinate approach, we simulate the linear waveguide as a coupled resonator array at the high energy limit. We generally calculate the transmission coefficients and its vanishing at resonace reflects the good controllability of our scheme. We also show that there exist two bound states to describe the localize photons around the cavity.