论文标题
范德华陷阱中非线性振荡器的布朗运动
Brownian motion of nonlinear oscillator in van der Waals trap
论文作者
论文摘要
范德华陷阱是一种量子波动引起的电势，其特征是短距离排斥和远程吸引力，是本质上非线性的。这项工作揭示了使用Langevin Dynamics模拟和准时近似值对范德华陷阱中布朗振荡器的非线性影响。尽管有效固有频率的大小和温度依赖性对于大面积的悬浮板都不重要，但较小概率分布的较小板显着变软，甚至观察到温度引起的软化。尽管具有非线性，但摩擦的刚度和摩擦系数可以通过改变涂层的厚度和分别修改悬浮板的尺寸和穿孔状态来调整，从而使量子陷阱赋予了构建微观机械系统的灵活性，并探测了近具有强度的水力动力学。
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.
