Lindenberg Katja, Sancho J M, Lacasta A M, Sokolov I M
Department of Chemistry and Biochemistry 0340, and Institute for Nonlinear Science, University of California, San Diego, La Jolla, California 92093-0340, USA.
Phys Rev Lett. 2007 Jan 12;98(2):020602. doi: 10.1103/PhysRevLett.98.020602. Epub 2007 Jan 10.
We study and characterize a new dynamical regime of underdamped particles in a tilted washboard potential. We find that for small friction in a finite range of forces the particles move essentially nondispersively, that is, coherently, over long intervals of time. The associated distribution of the particle positions moves at an essentially constant velocity and is far from Gaussian-like. This new regime is complementary to, and entirely different from, well-known nonlinear response and large dispersion regimes observed for other values of the external force.
我们研究并描述了倾斜搓板势中欠阻尼粒子的一种新动力学机制。我们发现，在有限力范围内，对于小摩擦，粒子在长时间间隔内基本无散射地移动，即相干移动。粒子位置的相关分布以基本恒定的速度移动，且远非高斯分布。这种新机制与在外力其他值下观察到的著名非线性响应和大散射机制互补且完全不同。
