Overview of Spin-Based Quantum Dot Quantum Computation

TL;DR

This paper reviews the current state of spin-based quantum dot quantum computation, focusing on theoretical models, spin interactions, and material implementations in GaAs and SiGe systems.

Contribution

It provides a comprehensive overview of the theoretical and experimental challenges and developments in spin-based quantum dot quantum computing.

Findings

Heisenberg exchange Hamiltonian effectively models two-electron interactions in GaAs double dots.

Discussion of spin relaxation, encoding, and measurement techniques.

Overview of quantum computation prospects in SiGe quantum dots and silicon donors.

Abstract

Here we give an overview of the research on spin-based quantum dot quantum computation. In particular, we discuss the conditions for the Heisenberg exchange Hamiltonian to be a satisfactory description of two-electron interaction in a GaAs double dot. We also discuss theoretical issues related to spin relaxation, spin encoding, and spin measurement. A brief account is also given to spin-based quantum computation in SiGe quantum dots and donors in Si.