Using interference for high fidelity quantum state transfer in optomechanics

TL;DR

This paper demonstrates a method for high-fidelity quantum state transfer between electromagnetic cavities using an optomechanical system that leverages a mechanical dark state to minimize dissipation effects.

Contribution

It introduces the concept of a mechanical dark state in optomechanics for efficient quantum state transfer, providing analytic fidelity expressions for various quantum states.

Findings

High-fidelity transfer enabled by mechanical dark state

Analytic fidelity formulas for Gaussian and non-Gaussian states

Immunity to mechanical dissipation enhances transfer efficiency

Abstract

We revisit the problem of using a mechanical resonator to perform the transfer of a quantum state between two electromagnetic cavities (e.g. optical and microwave). We show that this system possesses an effective mechanical dark state which is immune to mechanical dissipation; utilizing this feature allows highly efficient transfer of intra-cavity states, as well as of itinerant photon states. We provide simple analytic expressions for the fidelity of transferring both Gaussian and non-Gaussian states.