Influence of configuration and acoustic phonons on three-qubit controlled-phase gate

TL;DR

This paper investigates how the arrangement of quantum dots and acoustic phonons influence the fidelity of a three-qubit controlled-phase gate, highlighting the importance of configuration and temperature for optimal performance.

Contribution

It provides a numerical analysis of the effects of quantum dot configuration and acoustic phonons on gate fidelity, emphasizing the benefits of a line-configuration resonant with lower exciton levels.

Findings

Gate fidelity depends strongly on configuration and temperature.

Line-configuration resonant with lower exciton energy performs better.

Numerical simulations demonstrate the impact of phonons and configuration on gate performance.

Abstract

We discuss the configuration and acoustic phonon effect on the conditional phase gate using self assembled quantum dots. As an example, we discuss the simplest three dots conditional phase gate, and we found that the fidelity of conditional phase gate depends strongly on the configuration and temperature. Numerical simulation shows that line-configuration resonant with lower single exciton energy level performs better during the gate operation.