Non-Markovian effects at the Fermi-edge singularity in quantum dots

TL;DR

This paper investigates non-Markovian quantum effects in electron transport through quantum dots at the Fermi-edge singularity, highlighting how many-electron correlations and coherence induce significant memory effects at low temperatures.

Contribution

It provides a detailed analysis of non-Markovian dynamics in quantum dot transport, emphasizing the role of quantum memory effects in the Fermi-edge singularity regime.

Findings

Non-Markovian effects are pronounced at low temperatures.

Current noise reveals significant memory effects.

Trace-distance measures quantify non-Markovianity.

Abstract

We study electronic transport through a quantum dot in the Fermi-edge singularity regime, placing emphasis on its non-Markovian attributes. These are quantified by the behavior of current noise as well as trace-distance-based measure of non-Markovianity and found to be pronounced at low temperatures where the interplay of many-electron correlations and quantum coherence present in the system leads to significant quantum memory effects and non-Markovian dynamics.