Quantum phase gate for optical qubits with cavity quantum optomechanics

TL;DR

This paper proposes a method to implement a deterministic quantum phase gate between optical qubits using a cavity optomechanical system with two coupled optical modes and a mechanical resonator, feasible under strong coupling conditions.

Contribution

It introduces a novel scheme for a quantum phase gate leveraging cavity optomechanics with two optical modes and a mechanical resonator, robust against losses.

Findings

Feasible with strong single-photon optomechanical coupling

Operates effectively in the resolved sideband regime

Robust against cavity losses

Abstract

We show that a cavity optomechanical system formed by a mechanical resonator simultaneously coupled to two modes of an optical cavity can be used for the implementation of a deterministic quantum phase gate between optical qubits associated with the two intracavity modes. The scheme is realizable for sufficiently strong single-photon optomechanical coupling in the resolved sideband regime, and is robust against cavity losses.