Optomechanical compensatory cooling mechanism with exceptional points

TL;DR

This paper introduces a novel compensatory cooling mechanism utilizing exceptional points in a dual-EPs optomechanical system to enhance phonon cooling and manipulate optomechanical interactions for quantum applications.

Contribution

It presents the first discovery of a dual-EPs system in Brillouin scattering optomechanics, enabling improved control over optical and phonon modes.

Findings

Dual-EPs system can be induced by two defects with specific angles.

The system actively manipulates coupling strengths of optical and phonon modes.

Results suggest potential for quantum state transfer and quantum interface protocols.

Abstract

The ground state cooling of Brillouin scattering optomechanical system is limited by defects in practical sample. In this paper, we propose a new compensatory cooling mechanism for Brillouin scattering optomechanical system with exceptional points (EPs). By using the EPs both in optical and mechanical modes, the limited cooling process is compensated effectively. The dual-EPs system, which is discovered in this work for the first time, can be induced by two defects with specific relative angles and has function of not only actively manipulating the coupling strength of optical modes but also the Brillouin phonon modes. Our results provide new tools to manipulate the optomechanical interaction in multi-mode systems and open the possibility of quantum state transfer and quantum interface protocols based on phonon cooling in quantum applications.