Dynamical encircling exceptional point in largely detuned multimode optomechanical system

TL;DR

This paper investigates the dynamical encircling of exceptional points in a largely detuned multimode optomechanical system, revealing nonreciprocal energy transfer and fundamental physics insights for optical mode manipulation.

Contribution

It introduces the study of state transfer via EP encircling in large detuning multimode optomechanics, highlighting nonreciprocal energy transfer and the effects of system parameters.

Findings

Successful nonreciprocal topological energy transfer between optical modes

Dependence of transfer on initial conditions and trajectory orientation

Discussion of evolution speed effects on the process

Abstract

Dynamical encircling exceptional point(EP) shows a number of intriguing physical phenomena and its potential applications. To enrich the manipulations of optical systems in experiment, here, we study the dynamical encircling EP, i.e. state transfer process, in largely detuned multimode optomechanical system. The process of state transfer has been investigated with different factors about the location of start point, the orientation and the initial state of the trajectories around the EP in parameter space. Results show that the nonreciprocal and the chiral topological energy transfer between two optical modes are performed successfully by tuning the effective optomechanical coupling in the multimode system with large detuning. Moreover, the factor of evolution speed about system parameters is also discussed. Our work demonstrates the fundamental physics around EP in large detuning domain of multimode optomechanical system and provides an alternative for manipulating of optical modes in non-hermitian system.