Geometric Stochastic Resonance in an Asymmetric T-Shaped Chamber
Author:
Duan Shouhui1,
Fan Bixuan1,
Duan Zhenglu1ORCID
Affiliation:
1. College of Physics, Communication and Electrons, Jiangxi Normal University, Nanchang 330022, China
Abstract
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.
Funder
National Natural Science Foundation of China
Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province
Natural Science Foundation of Jiangxi Province
Subject
Physics and Astronomy (miscellaneous),General Mathematics,Chemistry (miscellaneous),Computer Science (miscellaneous)