Tunable single-photon multi-channel quantum router based on a hybrid optomechanical system

TL;DR

This paper proposes a tunable, multi-channel quantum router for single photons using an optomechanical system with Coulomb coupling, enabling flexible routing and frequency selection for quantum networks.

Contribution

It introduces a novel, experimentally feasible multi-channel quantum routing scheme with tunable output channels based on Coulomb-coupled optomechanics.

Findings

Router can extract and direct single photons into three channels.

Output frequencies are adjustable via Coulomb coupling strength.

Performance remains robust against vacuum and thermal noise at 20 mK.

Abstract

Routing of photon play a key role in optical communication networks and quantum networks. Although the quantum routing of signals has been investigated in various systems both in theory and experiment, the general form of quantum routing with multi-output terminals still needs to be explored. Here, we propose an experimentally accessible tunable single-photon multi-channel routing scheme using a optomechanics cavity coulomb coupling to a nanomechanical resonator. The router can extract a single-photon from the coherent input signal directly modulate into three different output channels. More important, the two output signal frequencies can be selected by adjusting Coulomb coupling strength. We also demonstrate the vacuum and thermal noise will be insignificant for the optical performance of the single-photon router at temperature of the order of 20 mK. Our proposal may have paved a new avenue towards multi-channel router and quantum network.