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Acta Physica Sinica

Optical bistability study based on atomic-cavity opto-magneto-mechanical hybrid systems

Ma Huifang, YAN Yingce, Li Junlong, Tian Hongchao, Feng GAO

Published Jan 1, 2026• 0 citations

Abstract

本文提出了一种原子-腔光磁机械混合系统中磁振子与光学双稳态的调控理论模型。系统是由微波腔、磁振子、机械振子及原子系综构成，相互之间通过磁致伸缩耦合、光辐射压力及原子能级跃迁等作用相互耦合。基于含耗散与噪声项的量子朗之万方程求解，推导得到磁振子数与光子数的稳态解析解，通过数值结果解析证实了系统的双稳态特性。研究结果表明，两类双稳态均可通过耦合强度、失谐量及耗散系数实现精准调控；原子模式能够优化系统的可调谐性，临界驱动点的瞬时跃迁为开关效应提供了物理基础。本研究丰富了光磁机械混合系统的理论研究，为可调谐磁光器件及量子信息处理设备的研发提供了可靠的理论支撑，具有重要的理论研究价值和潜在的工程应用前景。

DOI: 10.7498/aps.75.20260350

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本文提出了一种原子-腔光磁机械混合系统中磁振子与光学双稳态的调控理论模型。系统是由微波腔、磁振子、机械振子及原子系综构成，相互之间通过磁致伸缩耦合、光辐射压力及原子能级跃迁等作用相互耦合。基于含耗散与噪声项的量子朗之万方程求解，推导得到磁振子数与光子数的稳态解析解，通过数值结果解析证实了系统的双稳态特性。研究结果表明，两类双稳态均可通过耦合强度、失谐量及耗散系数实现精准调控；原子模式能够优化系统的可调谐性，临界驱动点的瞬时跃迁为开关效应提供了物理基础。本研究丰富了光磁机械混合系统的理论研究，为可调谐磁光器件及量子信息处理设备的研发提供了可靠的理论支撑，具有重要的理论研究价值和潜在的工程应用前景。

We investigate theoretically the effect of optical feedback from a cavity containing an ultracold two level atomic ensemble, on the bistable behavior shown by mean intracavity optical field in an optomechanical cavity resonator. It turns out that the optical bistability can be controlled by tuning the frequency and power of the single driving laser as well as by varying different system parameters provided by the hybrid interaction. Significantly, even though the atomic cavity is not driven by any laser pump and there is no coupling with the mechanical oscillator directly, the intracavity optical field in the atomic cavity also exhibits bistability due to the optical coupling with the optomechanical cavity. In essence, our work emphasizes the possibility of realization of a better controllable optical switch depending on the hybrid interaction.

We investigate the effects of atomic collisions as well as optomechanical mirror–field coupling on the optical bistability in a hybrid system consisting of a Bose–Einstein condensate inside a driven optical cavity with a moving end mirror. It is shown that the bistability of the system can be controlled by the s-wave scattering frequency which can provide the possibility of realizing a controllable optical switch. On the other hand, by studying the effect of the Bogoliubov mode, as a secondary mechanical mode relative to the mirror vibrations, on the cooling process as well as the bipartite mirror–field and atom–field entanglements we find an interpretation for the cooling of the Bogoliubov mode. The advantage of this hybrid system in comparison to the bare optomecanical cavity with a two-mode moving mirror is the controllability of the frequency of the secondary mode through the s-wave scattering interaction.