Resonantly Induced Friction and Frequency Combs in Driven Nanomechanical Systems
Resonantly Induced Friction and Frequency Combs in Driven Nanomechanical Systems
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DOI：
10.1103/physrevlett.122.254301
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发表时间：
2019-06-27
影响因子：
8.6
通讯作者：
Weig, Eva M.
中科院分区：
文献类型：
--
作者：
Dykman, M., I;Rastelli, Gianluca;Weig, Eva M.
提出了共振驱动振动系统中摩擦的一种新机制。摩擦力的形式可以从时间和空间对称性的论证中得出。我们认为这种共振力在纳米机械系统的微观机制。摩擦可以是负的，导致强迫振动的振幅和相位的自持振荡的开始，这导致功率谱中的频率梳。
We propose a new mechanism of friction in resonantly driven vibrational systems. The form of the friction force follows from the time- and spatial-symmetry arguments. We consider a microscopic mechanism of this resonant force in nanomechanical systems. The friction can be negative, leading to the onset of self-sustained oscillations of the amplitude and phase of forced vibrations, which result in a frequency comb in the power spectrum.