Diverse methods and practical aspects in controlling single semiconductor qubits: a review

TL;DR

This review discusses various control techniques for single semiconductor qubits, emphasizing their practical application in achieving precise and robust quantum gates in solid-state quantum computing.

Contribution

It provides a comprehensive overview of control methods and practical considerations specific to semiconductor qubits, highlighting recent advances and challenges.

Findings

Various control methods enable high-fidelity quantum gates.

Practical aspects influence the robustness of quantum operations.

Control techniques are tailored to different types of semiconductor qubits.

Abstract

Quantum control allows a wide range of quantum operations employed in molecular physics, nuclear magnetic resonance and quantum information processing. Thanks to the existing microelectronics industry, semiconducting qubits, where quantum information is encoded in spin or charge degree freedom of electrons or nuclei in semiconductor quantum dots, constitute a highly competitive candidate for scalable solid-state quantum technologies. In quantum information processing, advanced control techniques are needed to realize quantum manipulations with both high precision and noise resilience. In this review, we first introduce the basics of various widely-used control methods, including resonant excitation, adabatic passage, shortcuts to adiabaticity, composite pulses, and quantum optimal control. Then we review the practical aspects in applying these methods to realize accurate and robust quantum gates for single semiconductor qubits, such as Loss-DiVincenzo spin qubit, spinglet-triplet qubit, exchange-only qubit and charge qubit.