Simulation of nonequilibrium spin dynamics in quantum dots subjected to periodic laser pulses

TL;DR

This paper presents large-scale simulations of spin dynamics in quantum dots under periodic laser pulses, revealing insights into physical mechanisms and the potential for resonant spin amplification, aiding future experimental research.

Contribution

It introduces advanced numerical methods and high-performance computing to simulate nonequilibrium spin states in quantum dots under realistic experimental conditions.

Findings

Identification of nonequilibrium stationary states near experimental parameters

Demonstration of resonant spin amplification in Faraday geometry

Guidance for tuning experimental parameters through simulations

Abstract

Large-scale simulations of the spin dynamics in quantum dots subjected to trains of periodic laser pulses enable us to describe and understand related experiments. By comparing the data for different models to experimental results, we gain an improved understanding of the relevant physical mechanisms. Using sophisticated numerical approaches and an efficient implementation combined with extrapolation arguments, nonequilibrium stationary states are reached for parameter ranges close to the ones in real experiments. With the help of high performance computing, we can tune the experimental parameters to guide future experimental research. Importantly, our simulations reveal the possibility of resonant spin amplification in Faraday geometry, i.e., when a longitudinal magnetic field is applied to the quantum dots.