Dimer chains in waveguide quantum electrodynamics

TL;DR

This paper investigates how single photons propagate through dimer chains coupled to waveguides, analyzing the effects of disorder and dipole interactions, with implications for quantum photonic devices.

Contribution

It provides a detailed theoretical analysis of photon transport in disordered dimer chains with dipole interactions in waveguide QED, highlighting the impact of disorder and emission directionality.

Findings

Disorder affects photon transmission and localization.

Dipole interactions influence transport properties.

Waveguide directionality modifies photon propagation behavior.

Abstract

We examine the propagation of single photons in periodic and disordered dimer chains coupled to one-dimensional chiral and bidirectional waveguides. Each dimer is composed of two dipole-coupled atoms. In the disordered setting, we separately treat two types of position disorder, namely in dimer length and in dimer separation. The focus of this study is to understand in what ways the interplay between dipole-dipole interactions and directionality of photon emission can impact the transport of single photons. Cold atoms trapped near optical fibers can serve as an experimentally realizable platform for the models that we consider.