Geometric Stochastic Resonance in an Asymmetric T-Shaped Chamber
Geometric Stochastic Resonance in an Asymmetric T-Shaped Chamber
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DOI：
10.3390/sym15122183
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发表时间：
2023-12
期刊：
影响因子：
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通讯作者：
Shouhui Duan;B. Fan;Zhenglu Duan
中科院分区：
文献类型：
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作者：
Shouhui Duan;B. Fan;Zhenglu Duan
The investigation of a Brownian particle subjected to an AC force that diffuses within a T-shaped chamber was conducted. This T-shaped chamber is composed of a strip cavity and a trapezoidal cavity positioned below it. The interplay between the AC force and asymmetric geometry creates a spatially bistable potential perpendicular to the AC force. With the assistance of noise, the particles can transition between two stable states and oscillate along the AC force at corresponding amplitudes at every spatially stable state. The asymmetric geometry facilitates the trapezoid cavity’s ability to more easily trap the Brownian particle than the upper strip cavity in the weak noise limit. Our observations reveal that proper noise can ensure the particle’s efficient trapping within the upper strip cavity and synchronization with the AC force, indicating the occurrence of geometric stochastic resonance. The T-shaped chamber serves as a simplified model, aiding in the further understanding of geometric stochastic resonance induced by irregular geometries and enabling the manipulation of microscopic particles in various small-scale systems.
