Spin interactions, relaxation and decoherence in quantum dots

TL;DR

This paper reviews recent research on spin decoherence and relaxation in quantum dots, highlighting progress towards using spins as qubits for quantum computing.

Contribution

It provides a comprehensive overview of spin dynamics in quantum dots, emphasizing recent advances that bring spin-based quantum information processing closer to reality.

Findings

Longer coherence times are achievable in quantum dots.

Both electron and hole spins show promise for quantum computing.

Progress towards practical spin qubits is significant.

Abstract

We review recent studies on spin decoherence of electrons and holes in quasi-two-dimensional quantum dots, as well as electron-spin relaxation in nanowire quantum dots. The spins of confined electrons and holes are considered major candidates for the realization of quantum information storage and processing devices, provided that sufficently long coherence and relaxation times can be achieved. The results presented here indicate that this prerequisite might be realized in both electron and hole quantum dots, taking one large step towards quantum computation with spin qubits.