Coupling an electron spin in a semiconductor quantum dot to an optical nano-cavity

TL;DR

This paper proposes a scheme to efficiently couple a single electron spin in a quantum dot to an optical nano-cavity, enabling high-fidelity spin control and fast initialization for quantum information applications.

Contribution

It introduces a novel method for coupling quantum dot electron spins to nano-cavities, enhancing photonic interfacing and spin manipulation speed and fidelity.

Findings

Achieves nearly 100% spin initialization fidelity.

Speeds up spin initialization beyond GHz.

Provides efficient spin-photon coupling in quantum dots.

Abstract

We propose a scheme to efficiently couple a single quantum dot electron spin to an optical nano-cavity, which enables us to simultaneously benefit from a cavity as an efficient photonic interface, as well as to perform high fidelity (nearly 100%) spin initialization and manipulation achievable in bulk semiconductors. Moreover, the presence of the cavity speeds up the spin initialization process beyond GHz.