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Quantum properties near the instability boundary in optomechanical system |
| Han-Hao Fang(方晗昊)1,2, Zhi-Jiao Deng(邓志姣)1,2,†, Zhigang Zhu(朱志刚)3, and Yan-Li Zhou(周艳丽)1,2 |
1 Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China;
2 Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha 410073, China;
3 Department of Physics, Lanzhou University of Technology, Lanzhou 730050, China |
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Abstract The properties of the system near the instability boundary are very sensitive to external disturbances, which is important for amplifying some physical effects or improving the sensing accuracy. In this paper, the quantum properties near the instability boundary in a simple optomechanical system have been studied by numerical simulation. Calculations show that the transitional region connecting the Gaussian states and the ring states when crossing the boundary is sometimes different from the region centered on the boundary line, but it is more essential. The change of the mechanical Wigner function in the transitional region directly reflects its bifurcation behavior in classical dynamics. Besides, quantum properties, such as mechanical second-order coherence function and optomechanical entanglement, can be used to judge the corresponding bifurcation types and estimate the parameter width and position of the transitional region. The non-Gaussian transitional states exhibit strong entanglement robustness, and the transitional region as a boundary ribbon can be expected to replace the original classical instability boundary line in future applications.
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Received: 18 September 2021
Revised: 04 December 2021
Accepted manuscript online: 08 December 2021
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PACS:
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03.65.Ud
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(Entanglement and quantum nonlocality)
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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42.50.Wk
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(Mechanical effects of light on material media, microstructures and particles)
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| Fund: This work is supported by the National Natural Science Foundation of China (Grant Nos. 11574398, 12174448, 12174447, 11904402, 12074433, 11871472, and 12004430). |
Corresponding Authors:
Zhi-Jiao Deng
E-mail: dengzhijiao926@hotmail.com
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Cite this article:
Han-Hao Fang(方晗昊), Zhi-Jiao Deng(邓志姣), Zhigang Zhu(朱志刚), and Yan-Li Zhou(周艳丽) Quantum properties near the instability boundary in optomechanical system 2022 Chin. Phys. B 31 030308
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