Charge dynamics in two-electron quantum dots

TL;DR

This paper explores how external voltages and magnetic fields influence charge oscillations in a two-electron quantum dot system, revealing conditions for inducing both one-electron and two-electron charge dynamics.

Contribution

It demonstrates the controllability of charge oscillations in two-electron quantum dots via external parameters, highlighting new ways to manipulate quantum states.

Findings

Charge oscillations depend on external magnetic field and potential periodicity.

Both one-electron and two-electron oscillations can be induced.

Parameter tuning enables control over charge dynamics.

Abstract

We investigate charge dynamics in a two-electron double quantum dot. The quantum dot is manipulated by using a time-dependent external voltage that induces charge oscillations between the dots. We study the dependence of the charge dynamics on the external magnetic field and on the periodicity of the external potential. We find that for suitable parameter values, it is possible to induce both one-electron and two-electron oscillations between the dots.