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Nonreciprocal mechanical entanglement in a spinning optomechanical system |
| Shan-Shan Chen(陈珊珊), Jing-Jing Zhang(张京京), Jia-Neng Li(李嘉能), Na-Na Zhang(张娜娜), Yong-Rui Guo(郭永瑞), and Huan Yang(杨桓)† |
| School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
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Abstract Quantum entanglement between distant massive mechanical oscillators is an important resource in sensitive measurements and quantum information processing. We achieve the nonreciprocal mechanical entanglement in a compound optomechanical device consisting of two mechanical oscillators and a spinning whispering-gallery mode (WGM) optical microresonator. It is found that obvious nonreciprocal mechanical entanglement emerges in this system in the presence of the Sagnac effect which is induced by the rotation of the WGM resonator, and the nonreciprocal region can be controlled by tuning the angular velocity of the rotation. The nonreciprocity originates from the breaking of the time-reversal symmetry of this multimode system due to the presence of the Sagnac effect. The optomechanical coupling and the mechanical interaction provide cooling channels for the first and second mechanical oscillators, respectively. Two mechanical oscillators can be cooled simultaneously. The simultaneous cooling and the mechanical coupling of two mechanical oscillators ensure the generation of mechanical entanglement. Furthermore, an optimal mechanical entanglement can be achieved when the moderate optical frequency detuning and the driving power are chosen. The thermal noise of the mechanical environment has a negative effect on mechanical entanglement. Our scheme provides promising opportunities for research of quantum information processing based on phonons and sensitive measurements.
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Received: 21 June 2024
Revised: 05 August 2024
Accepted manuscript online: 23 August 2024
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PACS:
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03.67.Bg
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(Entanglement production and manipulation)
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42.50.-p
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(Quantum optics)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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| Fund: This work was supported by the Scientific and Technological Research Program of Chongqing Municipal Education Commission (Grant No. KJQN202400624) and the Natural Science Foundation of Chongqing CSTC (Grant No. CSTB2022NSCQ-BHX0020). |
Corresponding Authors:
Huan Yang
E-mail: yanghuan@cqupt.edu.cn
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Cite this article:
Shan-Shan Chen(陈珊珊), Jing-Jing Zhang(张京京), Jia-Neng Li(李嘉能), Na-Na Zhang(张娜娜), Yong-Rui Guo(郭永瑞), and Huan Yang(杨桓) Nonreciprocal mechanical entanglement in a spinning optomechanical system 2024 Chin. Phys. B 33 110305
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