Slow light in semiconductor quantum dots: effects of non-Markovianity and correlation of dephasing reservoirs

TL;DR

This paper theoretically studies slow light in quantum dots, highlighting how non-Markovian effects and reservoir correlations significantly influence group velocity and transmission features in electromagnetically induced transparency.

Contribution

It introduces the importance of non-Markovian dynamics and reservoir correlations in controlling slow light in quantum-dot systems, an aspect previously underexplored.

Findings

Non-Markovian effects can enhance or inhibit slow light.

Reservoir correlations influence non-Markovian effects.

Significant shifts and distortions in transmission windows.

Abstract

A theoretical investigation on slow light propagation based on eletromagnetically induced transparency in a three-level quantum-dot system is performed including non-Markovian effects and correlated dephasing reservoirs. It is demonstraonated that the non-Markovian nature of the process is quite essential even for conventional dephasing typical of quantum dots leading to significant enhancement or inhibition of the group velocity slow-down factor as well as to the shifting and distortion of the transmission window. Furthermore, the correlation between dephasing reservoirs may also either enhance or inhibit non-Markovian effects.