Thermally-assisted net transport of a dimer in forced inertial inhomogeneous periodic substrates

Vincent R. Khongwir and W.L. Reenbohn

Physica A: Statistical Mechanics and its Applications, 2025, vol. 671, issue C

Abstract: In the presence of thermal fluctuations and taking into account inertial effects, the mobility of a dimer in forced inhomogeneous periodic substrates is investigated. The transport dynamics of the dimer, alongside the internal interaction of its constituent particles in response to an applied square wave force, are examined. The internal interaction is characterized by the combination of the elastic and the Lennard-Jones forces. The applied force is selected in the adiabatic limit, meaning the time period is significantly large. A substantial net flow of the dimer occurs within a narrow range of forcing amplitude. The transport of the dimer is characterized by thermally facilitated transitions between creeping motion and sliding motion. The internal interaction between the dimer’s components was found to play a significant role in determining the overall current.

Keywords: Dimer; Ratchet effect; Inertial effects; Adiabatic limit; Creeping motion; Sliding motion (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:671:y:2025:i:c:s0378437125002900

DOI: 10.1016/j.physa.2025.130638

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