Current Reversals of an Underdamped Brownian Particle in an Asymmetric Deformable Potential

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2018,（3）
• 页码范围: 266-270
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0253-6102/69/3/266

摘要

Transport of an underdamped Brownian particle in a one-dimensional asymmetric deformable potential is investigated in the presence of both an ac force and a static force,respectively.From numerical simulations,we obtain the current average velocity.The current reversals and the absolute negative mobility are presented.The increasing of the deformation of the potential can cause the absolute negative mobility to be suppressed and even disappear.When the static force is small,the increase of the potential deformation suppresses the absolute negative mobility.When the force is large,the absolute negative mobility disappears.In particular,when the potential deformation is equal to 0.015,the two current reversals present with the increasing of the force.Remarkably,when the potential deformation is small,there are three current reversals with the increasing of the friction coefficient and the average velocity presents a oscillation behavior.