Transport with hard-core interaction in a chain of asymmetric cavities

26th IUPAP Conference on Computational Physics

物理学;计算机科学

Suárez, G.P.^1,2 ; Hoyuelos, M.^1,2 ; Mártin, H.O.^1,2

Instituto de Investigaciones Fisicas de Mar Del Plata (IFIMAR-CONICET), Argentina^1

Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar Del Plata, Deán Funes 3350, Mar del Plata

7600, Argentina^2

关键词: Asymmetric effects;    External force;    Hard cores;    Hard-core interactions;    Jacobs equation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/640/1/012004/pdf
DOI  :  10.1088/1742-6596/640/1/012004

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In this paper we investigate the diffusion of particles inside a chain of asymmetric cavities. We are considering particles that interact through a hard-core potential and are driven by an external force. We show that the difference in the current when the force is applied to the left and to the right strongly depends on the concentration inside the cavity. We found that, when the concentration is high enough, the hard-core interaction vanishes and inverts the asymmetric effect of the cavity. We also introduce a new equation, a modification to the Fick- Jacobs equation, to describe this system analytically. Finally, we used numerical simulations to verify the analytic results, finding a good agreement between theory and simulations.