Transport of underdamped active particles in ratchet potentials
| Autor: | Feng-guo Li, Bao-quan Ai |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Friction coefficient Statistical Mechanics (cond-mat.stat-mech) media_common.quotation_subject Active particles Ratchet FOS: Physical sciences General Chemistry Mechanics Condensed Matter - Soft Condensed Matter Condensed Matter Physics Ratchet effect Inertia 01 natural sciences Periodic potential Asymmetry 010305 fluids & plasmas 0103 physical sciences Soft Condensed Matter (cond-mat.soft) 010306 general physics Condensed Matter - Statistical Mechanics media_common |
| Zdroj: | Soft matter. 13(13) |
| ISSN: | 1744-6848 |
| Popis: | We study the rectified transport of underdamped active noninteracting particles in an asymmetric periodic potential. It is found that the ratchet effect of active noninteracting particles occurs in a single direction (along the easy direction of the substrate asymmetry) in the overdamped limit. However, when the inertia is considered, it is possible to observe reversals of the ratchet effect, where the motion is along the hard direction of the substrate asymmetry. By changing the friction coefficient or the self-propulsion force, the average velocity can change its direction several times. Therefore, by suitably tailoring the parameters, underdamped active particles with different self-propulsion forces can move in different directions and can be separated. 7 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|