A quantum interface between light and nuclear spins in quantum dots

TL;DR

This paper proposes a quantum interface linking light and nuclear spins in quantum dots, enabling efficient quantum communication by controlling interactions for writing and reading quantum information.

Contribution

It introduces a method to realize a quantum interface between optical fields and nuclear spins in quantum dots via adiabatic elimination, enabling controlled write-in and read-out processes.

Findings

Effective coupling between light and nuclear spins achieved.

Controlled write-in and read-out interactions demonstrated.

Potential for quantum communication networks established.

Abstract

The coherent coupling of flying photonic qubits to stationary matter-based qubits is an essential building block for quantum communication networks. We show how such a quantum interface can be realized between a traveling-wave optical field and the polarized nuclear spins in a singly charged quantum dot strongly coupled to a high-finesse optical cavity. By adiabatically eliminating the electron a direct effective coupling is achieved. Depending on the laser field applied, interactions that enable either write-in or read-out are obtained.