Suppression of electron relaxation and dephasing rates in quantum dots caused by external magnetic fields

TL;DR

This paper investigates how external magnetic fields can suppress electron relaxation and dephasing in coupled quantum dots, revealing that magnetic fields significantly influence electron scattering rates and decoherence processes.

Contribution

It demonstrates the suppression of electron relaxation and dephasing rates in quantum dots through external magnetic fields, highlighting the dependence on magnetic field strength and quantum dot configuration.

Findings

Electron scattering rates decrease with increasing magnetic field.

Magnetic fields effectively suppress charge decoherence in quantum dots.

Quantum dot configuration influences the extent of relaxation suppression.

Abstract

An external magnetic field has been applied in laterally coupled dots (QDs) and we have studied the QD properties related to charge decoherence. The significance of the applied magnetic field to the suppression of electron-phonon relaxation and dephasing rates has been explored. The coupled QDs have been studied by varing the magnetic field and the interdot distance as other system parameters. Our numerical results show that the electron scattering rates are strongly dependent on the applied external magnetic field and the details of the double QD configuration.