A Tuneable Few Electron Triple Quantum Dot

TL;DR

This paper presents a tunable triple quantum dot device designed for precise electron control and quantum information applications, demonstrating specific resonant conditions and novel charge transfer behaviors.

Contribution

It introduces a new design for a tunable triple quantum dot with series arrangement and demonstrates tuning strategies for resonant conditions.

Findings

Achieved control of resonant conditions such as quadruple points

Observed novel charge transfer behaviors at specific configurations

Demonstrated potential for quantum information applications

Abstract

In this paper we report on a tuneable few electron lateral triple quantum dot design. The quantum dot potentials are arranged in series. The device is aimed at studies of triple quantum dot properties where knowing the exact number of electrons is important as well as quantum information applications involving electron spin qubits. We demonstrate tuning strategies for achieving required resonant conditions such as quadruple points where all three quantum dots are on resonance. We find that in such a device resonant conditions at specific configurations are accompanied by novel charge transfer behaviour.