arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.5760cond-mat.stat-mechcond-mat.softphysics.bio-ph
收藏

相互作用粒子的随机泵

Stochastic pump of interacting particles

Debasish Chaudhuri, Abhishek Dhar

摘要:

我们考虑布朗粒子的过阻尼运动,通过粒子排斥相互作用,在一个随时间和空间变化的外部潜力。我们表明,周期性的潜力,保持特定的位置依赖的相位关系产生时间平均的粒子定向电流。我们得到的晶格版本的模型,使用最近开发的微扰方法的分析结果。许多有趣的功能,如粒子-空穴对称性,电流反转与密度的变化,和系统的大小依赖性的电流。我们提出了可能的实验来测试我们的预测。

英文摘要:

We consider the overdamped motion of Brownian particles, interacting via particle exclusion, in an external potential that varies with time and space. We show that periodic potentials that maintain specific position-dependent phase relations generate time-averaged directed current of particles. We obtain analytic results for a lattice version of the model using a recently developed perturbative approach. Many interesting features like particle-hole symmetry, current reversal with changing density, and system-size dependence of current are obtained. We propose possible experiments to test our predictions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑