Strong and noise-tolerant entanglement in dissipative optomechanics

• URL: http://arxiv.org/abs/2501.09541v3
• Date: Mon, 03 Feb 2025 13:30:53 GMT
• Title: Strong and noise-tolerant entanglement in dissipative optomechanics
• Authors: Jiaojiao Chen, Wei Xiong, Dong Wang, Liu Ye,
• Abstract summary: We study quantum entanglement in a dissipative optomechanics, realized by a Michelson-Sagnac interferometer and a movable membrane. We show that quantum entanglement generated by dissipative coupling is significantly stronger and more noise-tolerant than that generated by coherent coupling.
• Score: 6.455285860188926
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• Abstract: Macroscopic entanglement, as critical quantum resources in quantum information science, has been extensively studied in coherent optomechanics over the past decades. However, entanglement in dissipative optomechanics, where the cavity linewidth is dependent on the position of the mechanical resonator, remains unexplored. In this work, we study quantum entanglement in a dissipative optomechanics, realized by a Michelson-Sagnac interferometer and a movable membrane. Such dissipative optomechanics allows to switch coherent and dissipative optomechanical coupling at will. With reliable parameters, we demonstrate that the steady-state mechanical displacement exhibits a nonlinear (linear) dependence on the driving power with coherent (dissipative) coupling. Further, we show that quantum entanglement generated by dissipative coupling is significantly stronger and more noise-tolerant than that generated by coherent coupling. When both the coherent and dissipative couplings are simultaneously considered, entanglement is instead weakened due to quantum interference. Our result indicates that dissipative optomechanical coupling may be a promising path to engineer strong and noise-tolerant quantum entanglement.

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