Multimode optomechanical cooling via general dark-mode control

• URL: http://arxiv.org/abs/2110.14885v3
• Date: Wed, 3 Aug 2022 05:04:56 GMT
• Title: Multimode optomechanical cooling via general dark-mode control
• Authors: Jian Huang, Deng-Gao Lai, Cheng Liu, Jin-Feng Huang, Franco Nori, Jie-Qiao Liao
• Abstract summary: The dark-mode effect is a stubborn obstacle for ground-state cooling of degenerate mechanical modes optomechanically coupled to a common cavity-field mode. We propose an auxiliary-cavity-mode method for simultaneous ground-state cooling of two degenerate or near-degenerate mechanical modes by breaking the dark mode.
• Score: 5.204626024588376
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The dark-mode effect is a stubborn obstacle for ground-state cooling of multiple degenerate mechanical modes optomechanically coupled to a common cavity-field mode. Here we propose an auxiliary-cavity-mode method for simultaneous ground-state cooling of two degenerate or near-degenerate mechanical modes by breaking the dark mode. We find that the introduction of the auxiliary cavity mode not only breaks the dark-mode effect, but also provides a new cooling channel to extract the thermal excitations stored in the dark mode. Moreover, we study the general physical-coupling configurations for breaking the dark mode in a generalized networkcoupled four-mode optomechanical system consisting of two cavity modes and two mechanical modes. We find the analytical dark-mode-breaking condition in this system. This method is general and it can be generalized to break the dark-mode effect and to realize the simultaneous ground-state cooling in a multiple-mechanicalmode optomechanical system. We also demonstrate the physical mechanism behind the dark-mode breaking by studying the breaking of dark-state effect in the N-type four-level atomic system. Our results not only provide a general method to control various dark-mode and dark-state effects in physics, but also present an opportunity to the study of macroscopic quantum phenomena and applications in multiple-mechanical-resonator systems.

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