Materials for Silicon Quantum Dots and their Impact on Electron Spin Qubits

TL;DR

This paper reviews how material choices in silicon quantum dots influence electron spin qubit performance, emphasizing the importance of material properties for scalable quantum computing.

Contribution

It provides a comprehensive analysis of material properties affecting silicon quantum dot qubits, highlighting their impact on qubit variability and performance.

Findings

Material properties significantly influence qubit coherence and stability

Different material combinations lead to variability in qubit performance

Understanding material impacts is crucial for scalable quantum computer design

Abstract

Quantum computers have the potential to efficiently solve problems in logistics, drug and material design, finance, and cybersecurity. However, millions of qubits will be necessary for correcting inevitable errors in quantum operations. In this scenario, electron spins in gate-defined silicon quantum dots are strong contenders for encoding qubits, leveraging the microelectronics industry know-how for fabricating densely populated chips with nanoscale electrodes. The sophisticated material combinations used in commercially manufactured transistors, however, will have a very different impact on the fragile qubits. We review here some key properties of the materials that have a direct impact on qubit performance and variability.