Abstract
The ground-state cooling of the Brillouin scattering optomechanical system is limited by defects in practical samples. In this paper, we present a compensatory cooling mechanism for a Brillouin scattering optomechanical system with exceptional points (EPs). The dual-EP system, described in this paper, can be induced by two defects with specific relative angles and is demonstrated to effectively compensate the limited cooling process. The system actively manipulates the coupling strength of not only the optical modes but also the Brillouin phonon modes. Our results provide tools to manipulate the optomechanical interaction in multimode systems and open possibilities for quantum state transfer and quantum interface protocols based on phonon cooling in quantum applications.
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