Spectrum of coherently backscattered light from two atoms

TL;DR

This paper provides an analytical and numerical study of the inelastic coherent backscattering spectrum from two cold atoms, revealing frequency-dependent interference effects including positive, negative, and dispersive features explained by reciprocity and dressed state analysis.

Contribution

It introduces a detailed analysis of the inelastic coherent backscattering spectrum, highlighting novel frequency-dependent interference phenomena in two-atom systems.

Findings

Interference contribution can be positive, negative, or dispersive depending on frequency.

Reciprocity arguments explain the observed spectral features.

Dressed state two-photon scattering amplitudes elucidate the interference behavior.

Abstract

We present a detailed analytical and numerical analysis of the inelastic coherent backscattering spectrum of laser light incident on cold atoms. We identify frequency domains where the interference contribution can be positive \emph{as well as} negative -- or exhibits dispersive character. These distinctive features are explained by reciprocity arguments and dressed state two-photon scattering amplitudes.