Comment on 'Absolute negative mobility in a one-dimensional overdamped system'

TL;DR

This paper critically examines a recent claim about absolute negative mobility in a one-dimensional overdamped system, identifying errors in the original analysis and demonstrating through simulations that the phenomenon does not occur in that model.

Contribution

The authors correct a previous claim by performing accurate numerical simulations, showing that the proposed minimal model does not exhibit absolute negative mobility.

Findings

The original model's claim of ANM is incorrect.

Numerical simulations show no ANM in the considered system.

The paper clarifies the conditions needed for ANM to occur.

Abstract

Recently Ru-Yin Chen et al. (Phys. Lett. A 379 (2015) 2169-2173) presented results on the absolute negative mobility (ANM) in a one-dimensional overdamped system and claimed that a new minimal model of ANM was proposed. We suggest that the authors introduced a mistake in their calculations. Then we perform a precise numerical simulation of the corresponding Langevin equation to show that the ANM phenomenon does not occur in the considered system.