# Spin and tunneling dynamics in an asymmetrical double quantum dot with spin - orbit coupling

## TL;DR

This paper investigates how spin and tunneling behaviors in a one-dimensional GaAs double quantum dot are influenced by magnetic fields and spin-orbit interactions, revealing complex oscillations useful for quantum computing.

## Contribution

It provides a detailed analysis of spin and tunneling dynamics considering asymmetrical quantum states and the effects of Rashba and Dresselhaus spin-orbit couplings.

## Key findings

- Spin dynamics show superposition of slow and fast Rabi oscillations.
- Rashba interaction and magnetic field significantly affect slow Rabi oscillations.
- Results are relevant for single qubit manipulation in quantum computing.

## Abstract

In this article we study the spin and tunneling dynamics as a function of magnetic field in a one-dimensional GaAs double quantum dot with both the Dresselhaus and Rashba spin-orbit coupling. In particular we consider different spatial widths for the spin-up and spin-down electronic states. We find that the spin dynamics is a superposition of slow as well as fast Rabi oscillations. It is found that the Rashba interaction strength as well as the external magnetic field strongly modifies the slow Rabi oscillations which is particularly useful for single qubit manipulation for possible quantum computer applications.