论文标题
纳米力学转子在倾斜垫板中的巨大扩散电势
Giant diffusion of nanomechanical rotors in a tilted washboard potential
论文作者
论文摘要
我们提出了在低摩擦极限下具有偏见的光学周期性潜力的实验实现。锁定（扭转）和跑步（旋转）状态之间的噪声引起的双重运动在纳米贝尔的旋转运动中是由椭圆极化光束驱动的，从而驱动了角度的电势。通过改变最大间歇性点附近的气压，旋转有效扩散系数在自由空间扩散中增加了3个以上的数量级。这些实验结果与一个简单的两态模型一致，该模型是通过使用时间尺度分离从Langevin方程得出的。我们的工作提供了一个新的实验平台，以研究该系统扩散的弱热噪声限制。
We present an experimental realization of a biased optical periodic potential in the low friction limit. The noise-induced bistability between locked (torsional) and running (spinning) states in the rotational motion of a nanodumbbell is driven by an elliptically polarized light beam tilting the angular potential. By varying the gas pressure around the point of maximum intermittency, the rotational effective diffusion coefficient increases by more than 3 orders of magnitude over free-space diffusion. These experimental results are in agreement with a simple two-state model that is derived from the Langevin equation through using timescale separation. Our work provides a new experimental platform to study the weak thermal noise limit for diffusion in this system.
