Non-equilibrium dynamics in coupled quantum dots

TL;DR

This paper investigates the non-equilibrium electron dynamics in coupled quantum wells, deriving nonlinear evolution equations considering interactions, and reveals potential for electrostatic trapping of electrons.

Contribution

It introduces a detailed model of electron dynamics in non-symmetric double quantum wells including electron-phonon interactions and time-dependent potentials.

Findings

Electrostatic traps for electrons can form in coupled quantum wells.

Nonlinear dynamical equations for carrier wave functions are derived.

Electron-phonon interactions influence non-equilibrium behavior.

Abstract

The aim of this work is to study the non-equilibrium dynamics of electrons in a coupled quantum well pair. To achieve this aim, we consider a non-symmetric distribution of electrons in a double quantum well. We derive the nonlinear dynamical evolution of the carrier wave functions considering electron-phonon interactions and a time-dependent Hartree potential in multielectron quantum dots. We show the possibility of having an electrostatic trap for part of the electrons which are injected into one of the quantum wells.