Properties of a single photon generated by a solid-state emitter: effects of pure dephasing

TL;DR

This paper analyzes how pure dephasing affects the properties of single photons emitted by solid-state sources, providing analytical tools to optimize photon purity for quantum technologies.

Contribution

It introduces an analytical model for the emitted photon’s density matrix considering pure dephasing, enabling detailed characterization and optimization of photon quality.

Findings

Derived the photon’s density matrix analytically.

Identified conditions for maximizing photon purity.

Provided realistic parameter visualizations.

Abstract

We investigate the properties of a single photon generated by a solid-state emitter subject to strong pure dephasing. We employ a model in which all the elements of the system, including the propagating fields, are treated quantum mechanically. We analytically derive the density matrix of the emitted photon, which contains full information about the photon, such as its pulse profile, power spectrum, and purity. We visualize these analytical results using realistic parameters and reveal the conditions for maximizing the purity of generated photons.