Controlling photon transport in the single-photon weak-coupling regime of cavity optomechanics

TL;DR

This paper demonstrates how photon transport can be controlled in an optomechanical system even in the weak-coupling regime, enabling quantum devices like diodes and single-photon sources without requiring strong coupling.

Contribution

It analytically shows photon blockade and transport control in both strong and weak coupling regimes, broadening the applicability of optomechanical quantum devices.

Findings

Photon blockade achieved in weak-coupling regime

System functions as a quantum optical diode and single-photon source

Photon transport control does not require strong coupling

Abstract

We study the photon statistics properties of few-photon transport in an optomechanical system where an optomechanical cavity couples to two empty cavities. By analytically deriving the one- and two-photon currents in terms of a zero-time-delayed two-order correlation function, we show that a photon blockade can be achieved in both the single-photon strong-coupling regime and the single-photon weak-coupling regime due to the nonlinear interacting and multipath interference. Furthermore, our systems can be applied as a quantum optical diode, a single-photon source, and a quantum optical capacitor. It is shown that this the photon transport controlling devices based on photon antibunching does not require the stringent single-photon strong-coupling condition. Our results provide a promising platform for the coherent manipulation of optomechanics, which has potential applications for quantum information processing and quantum circuit realization.