Roughness induced current reversal in fractionalhydrodynamic memory

Yuanyuan Jiao,1 Chunhua Zeng,1,a) and Yuhui Luo2,b)

ABSTRACTThe existence of a corrugated surface is of great importance and ubiquity in biological systems, exhibiting diverse dynamic behaviors.However, it has remained unclear whether such rough surface leads to the current reversal in fractional hydrodynamic memory. We investigate the transport of a particle within a rough potential under external forces in a subdiffusive media with fractional hydrodynamic memory.The results demonstrate that roughness induces current reversal and a transition from no transport to transport. These phenomena areanalyzed through the subdiffusion, Peclet number, useful work, input power, and thermodynamic efficiency. The analysis reveals that transport results from energy conversion, wherein time-dependent periodic force is partially converted into mechanical energy to drive transportagainst load, and partially dissipated through environmental absorption. In addition, the findings indicate that the size and shape of ratchettune the occurrence and disappearance of the current reversal, and control the number of times of the current reversal occurring. Furthermore, we find that temperature, friction, and load tune transport, resonant-like activity, and enhanced stability of the system, as evidenced bythermodynamic efficiency. These findings may have implications for understanding dynamics in biological systems and may be relevant forapplications involving molecular devices for particle separation at the mesoscopic scale.Published under an exclusive license by AIP Publishing. https://doi.org/10.1063/5.0164625