Opto-mechanical transducers for long-distance quantum communication

TL;DR

This paper introduces a versatile opto-mechanical scheme for converting stationary qubits into photonic states, enabling long-distance quantum communication across various solid-state systems with high fidelity.

Contribution

The proposed scheme allows for universal qubit-photon conversion without relying on specific optical properties, facilitating scalable quantum networks.

Findings

High fidelity quantum state transfer achievable with electronic spin qubits.

Effective quantum communication with superconducting charge qubits.

Robustness against main noise sources in realistic conditions.

Abstract

We describe a new scheme to interconvert stationary and photonic qubits which is based on indirect qubit-light interactions mediated by a mechanical resonator. This approach does not rely on the specific optical response of the qubit and thereby enables optical quantum interfaces for a wide range of solid state spin and charge based systems. We discuss the implementation of quantum state transfer protocols between distant nodes of a large scale network and evaluate the effect of the main noise sources on the resulting state transfer fidelities. For the specific examples of electronic spin qubits and superconducting charge qubits we show that high fidelity quantum communication protocols can be implemented under realistic experimental conditions.