Quantum properties near the instability boundary in optomechanical system

被引:0
作者
Han-Hao Fang [1 ,2 ]
Zhi-Jiao Deng [1 ,2 ]
Zhu, Zhigang [3 ]
Yan-Li Zhou [1 ,2 ]
机构
[1] Natl Univ Def Technol, Coll Liberal Arts & Sci, Dept Phys, Changsha 410073, Peoples R China
[2] Natl Univ Def Technol, Interdisciplinary Ctr Quantum Informat, Changsha 410073, Peoples R China
[3] Lanzhou Univ Technol, Dept Phys, Lanzhou 730050, Peoples R China
基金
中国国家自然科学基金;
关键词
optomechanical system; instability boundary; transitional region; quantum properties; DYNAMICS;
D O I
10.1088/1674-1056/ac40f7
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
收藏
页数:7
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