Spin state readout by quantum jump technique: for the purpose of quantum computing

TL;DR

This paper proposes a spin state readout method for single electrons in quantum dots using quantum jump technique and spin-dependent fluorescence induced by circular polarized light, enhancing quantum computing capabilities.

Contribution

It introduces a novel spin readout approach leveraging quantum jump technique and Pauli-blocking in quantum dots, improving measurement precision for quantum computing.

Findings

Spin-dependent fluorescence enables effective spin state detection.

Quantum jump technique provides high-fidelity readout.

Method demonstrates potential for quantum information processing.

Abstract

Utilizing the Pauli-blocking mechanism we show that shining circular polarized light on a singly-charged quantum dot induces spin dependent fluorescence. Employing the quantum-jump technique we demonstrate that this resonance luminescence, due to a spin dependent optical excitation, serves as an excellent readout mechanism for measuring the spin state of a single electron confined to a quantum dot.