Quantum optical interface for gate-controlled spintronic devices

TL;DR

This paper presents a quantum optical interface that coherently couples charge and spin states in gate-defined quantum dots to light, enabling advanced quantum control and entanglement generation.

Contribution

It introduces a novel opto-electronic structure linking spintronic devices with optical systems for quantum information processing.

Findings

Demonstrates optical read-out of quantum bits in semiconductor quantum dots.

Shows potential for generating entangled photon-spin pairs.

Proposes applications in quantum control techniques.

Abstract

We describe an opto-electronic structure in which charge and spin degrees of freedom in electrical gate-defined quantum dots can be coherently coupled to light. This is achieved via electron-electron interaction or via electron tunneling into a proximal self-assembled quantum dot. We illustrate potential applications of this approach by considering several quantum control techniques, including optical read-out of gate-controlled semiconductor quantum bits and controlled generation of entangled photon-spin pairs.