Controllable nonlinearity in a dual-coupling optomechanical system under a weak-coupling regime

TL;DR

This paper demonstrates how a dual-coupling optomechanical system can achieve controllable and enhanced quantum nonlinearity in a weak-coupling regime through laser driving, enabling phenomena like phonon sidebands and photon blockade.

Contribution

It introduces a method to induce strong, controllable nonlinearity in a dual-coupling optomechanical system under weak coupling conditions, expanding quantum control possibilities.

Findings

Controllable nonlinearity is achieved via laser driving.

Enhanced nonlinearity enables phonon sidebands and photon blockade.

Dissipation can be effectively suppressed in the system.

Abstract

Strong quantum nonlinearity gives rise to many interesting quantum effects and has wide applications in quantum physics. Herewe investigate the quantum nonlinear effect of an optomechanical system (OMS) consisting of both linear and quadratic coupling. Interestingly, a controllable optomechanical nonlinearity is obtained by applying a driving laser into the cavity. This controllable optomechanical nonlinearity can be enhanced into a strong coupling regime, even if the system is initially in the weak-coupling regime. Moreover, the system dissipation can be suppressed effectively, which allows the appearance of phonon sideband and photon blockade effects in the weak-coupling regime. This work may inspire the exploration of a dual-coupling optomechanical system as well as its applications in modern quantum science.