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arXiv 0801.4767cond-mat.stat-mechcond-mat.dis-nn
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驱动无序系统的锁模边值问题

Mode-Locking in Driven Disordered Systems as a Boundary-Value Problem

William Kung, M. Cristina Marchetti

摘要:

我们将无序介质中的锁模作为边值问题来研究。针对最简单的一类锁模模型,其中包括一个单一的驱动过阻尼自由度,我们开发了一种分析方法,以获得的Arnol'd舌头的形状在制度的低交流驱动振幅或高交流驱动频率。该方法对扇形钉扎电位是精确的,并易于适用于其他钉扎电位。它是对基于著名的Shapiro的论点的分析的补充,该论点在大驱动振幅或低驱动频率的微扰区中成立,其中钉扎效应较弱。

英文摘要:

We study mode-locking in disordered media as a boundary-value problem. Focusing on the simplest class of mode-locking models which consists of a single driven overdamped degree-of-freedom, we develop an analytical method to obtain the shape of the Arnol'd tongues in the regime of low ac-driving amplitude or high ac-driving frequency. The method is exact for a scalloped pinning potential and easily adapted to other pinning potentials. It is complementary to the analysis based on the well-known Shapiro's argument that holds in the perturbative regime of large driving amplitudes or low driving frequency, where the effect of pinning is weak.

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