Optimal generation of indistinguishable photons from non-identical artificial molecules

TL;DR

This paper demonstrates a theoretical method to generate nearly indistinguishable photons from non-identical semiconductor sources by optimizing external driving fields and virtual Raman transitions, despite spectral inhomogeneity.

Contribution

It introduces a novel approach using virtual Raman transitions and optimized driving fields to produce indistinguishable photons from non-identical sources, increasing tolerance to spectral differences.

Findings

Tolerance to spectral inhomogeneity increased to the meV range

Photon indistinguishability depends on the trade-off with efficiency

Coincidence probability scales linearly with dephasing and quadratically with relaxation

Abstract

We show theoretically that nearly indistinguishable photons can be generated with non-identical semiconductor-based sources. The use of virtual Raman transitions and the optimization of the external driving fields increases the tolerance to spectral inhomogeneity to the meV energy range. A trade-off emerges between photon indistinguishability and efficiency in the photon-generation process. Linear (quadratic) dependence of the coincidence probability within the Hong-Ou-Mandel setup is found with respect to the dephasing (relaxation) rate in the semiconductor sources.