Accuracy of the quantum regression theorem for photon emission from a quantum dot
Abstract
The quantum regression theorem (QRT) is the most-widely used tool for calculating multitime correlation functions for the assessment of quantum emitters. It is an approximate method based on a Markov assumption for the environmental coupling. In this work we quantify properties of photons emitted from a single quantum dot coupled to phonons. For the single-photon purity and the indistinguishability, we compare numerically exact path-integral results with those obtained from the QRT. It is demonstrated that the QRT systematically overestimates the influence of the environment for typical quantum dots used in quantum information technology.
Cite
@article{arxiv.2103.13100,
title = {Accuracy of the quantum regression theorem for photon emission from a quantum dot},
author = {M. Cosacchi and T. Seidelmann and M. Cygorek and A. Vagov and D. E. Reiter and V. M. Axt},
journal= {arXiv preprint arXiv:2103.13100},
year = {2021}
}
Comments
8 pages, 2 figures; Erratum added to ancillary files: main conclusions unchanged, additional insights on PMEs