Dykman M I, Rastelli Gianluca, Roukes M L, Weig Eva M
Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany.
Phys Rev Lett. 2019 Jun 28;122(25):254301. doi: 10.1103/PhysRevLett.122.254301.
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.
我们提出了一种共振驱动振动系统中摩擦的新机制。摩擦力的形式源于时间和空间对称性的论证。我们考虑了纳米机械系统中这种共振力的微观机制。这种摩擦可以是负的，导致受迫振动的振幅和相位出现自持振荡，这会在功率谱中产生频率梳。
