Andreev quantum dots for spin manipulation

TL;DR

This paper explores the potential of Andreev quantum dots as a platform for spin manipulation and quantum computing, highlighting their advantages over traditional semiconductor quantum dots.

Contribution

It demonstrates that AQDs can be used to achieve and manipulate spin-1/2 states, enabling their use in quantum computing applications.

Findings

AQDs can be brought into spin-1/2 states

Coupling AQDs with superconducting currents enables spin manipulation

AQDs can serve as a basis for universal quantum computing

Abstract

Andreev quantum dot (AQD) is a superconducting junction where Bogolyubov quasiparticles can be trapped in discrete Andreev levels. We investigate the feasibility of manipulating individual spin in an AQD. We show that AQD can be brought into spin-1/2 state. The coupling between spin and superconducting current facilitate manipulation and measurement of this state in comparison with common semiconductor quantum dots. We demonstrate that AQD's coupled inductively can serve as a solid-state base for universal quantum computing.