Phonon networks with SiV centers in diamond waveguides

TL;DR

This paper proposes a solid-state quantum network using silicon-vacancy centers in diamond waveguides, enabling high-fidelity quantum communication and exploring strong-coupling phonon interactions at the quantum level.

Contribution

It introduces a novel phonon-based quantum network platform with scalable communication and strong defect-phonon coupling in diamond waveguides.

Findings

High-fidelity quantum state transfer achievable under realistic conditions.

Scalable chip-scale quantum communication protocols demonstrated.

Platform enables exploration of strong-coupling effects in waveguide QED.

Abstract

We propose and analyze a novel realization of a solid-state quantum network, where separated silicon-vacancy centers are coupled via the phonon modes of a quasi-1D diamond waveguide. In our approach, quantum states encoded in long-lived electronic spin states can be converted into propagating phonon wavepackets and be reabsorbed efficiently by a distant defect center. Our analysis shows that under realistic conditions, this approach enables the implementation of high-fidelity, scalable quantum communication protocols within chip-scale spin-qubit networks. Apart from quantum information processing, this setup constitutes a novel waveguide QED platform, where strong-coupling effects between solid-state defects and individual propagating phonons can be explored at the quantum level.