Brownian motion of nonlinear oscillator in van der Waals trap

Autor:	Liu, Xiaofei, Chen, Fangyuan, Kou, Zepu, Guo, Wanlin
Rok vydání:	2022
Předmět:	Physics - Chemical Physics Nonlinear Sciences - Chaotic Dynamics Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
Popis:	Van der Waals trap, a quantum fluctuation-induced potential characterized by short-range repulsive and long-range attractive forces, is intrinsically nonlinear. This work unveils the nonlinear effects on Brownian oscillators in the van der Waals trap using Langevin dynamics simulations and quasiharmonic approximations. While neither size- nor temperature-dependences of effective natural frequency is important for suspended plates of large areas, smaller ones with broader probability distributions are significantly softened and even a temperature-induced softening is observed. Despite the nonlinearity, the stiffness and the coefficient of friction are tunable by changing the thickness of coating and by modifying the size and the perforation condition of suspended plates, respectively, endowing the quantum trap with flexibilities of building up microscopic mechanical systems and probing near-boundary hydrodynamics. Comment: 15 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2209.00845 Zobrazit plný text záznamu View this record from Arxiv