基于纳米管的NEMS：控制与热力学波动
Nanotube-Based NEMS: Control vs. Thermodynamic Fluctuations
摘要：
以吉赫振荡器为例，对受非均匀电场控制的纳米管纳机电系统进行了多尺度仿真。利用分子动力学模拟，我们得到了与纳米管壁的相对运动相关的摩擦系数和热噪声特性。这些结果用于唯象一维振子模型。基于该模型和振荡能量分布函数的Fokker-Planck方程的分析表明，热力学波动如何限制控制小尺寸系统的NEMS操作的可能性。确定了能够控制振荡器操作的力的参数。
英文摘要：
Multi-scale simulations of nanotube-based nanoelectromechanical systems (NEMS) controlled by a nonuniform electric field are performed by an example of a gigahertz oscillator. Using molecular dynamics simulations, we obtain the friction coefficients and characteristics of the thermal noise associated with the relative motion of the nanotube walls. These results are used in a phenomenological one-dimensional oscillator model. The analysis based both on this model and the Fokker-Planck equation for the oscillation energy distribution function shows how thermodynamic fluctuations restrict the possibility of controlling NEMS operation for systems of small sizes. The parameters of the force for which control of the oscillator operation is possible are determined.
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