A turnstile electron-spin entangler in semiconductors

TL;DR

This paper proposes a quantum dot-based device that uses optical excitation to generate and control spin-entangled electrons, with potential applications in quantum information processing.

Contribution

It introduces a novel optically triggered turnstile mechanism for creating spin-entangled electrons in semiconductors, detailing the transfer of quantum properties and disentanglement processes.

Findings

Identification of key disentanglement mechanisms

Proposal of experimental detection methods

Potential for quantum information applications

Abstract

We propose a single-electron doped quantum dot in a field-effect structure as an optically triggered turnstile for spin-entangled electrons. A short laser pulse excites a charged exciton, whose quantum properties are transferred through tunneling and relaxation to the spin entanglement between electrons in the dot and contact. We identify the pertinent disentanglement mechanisms, and discuss experimental detection and possible application schemes.