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arXiv · 2010.06541

Out-of-equilibrium Frenkel-Kontorova model

A. Imparato
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Abstract

A 1D model of interacting particles moving over a periodic substrate and in a position dependent temperature profile is considered. When the substrate and the temperature profile are spatially asymmetric a center-of-mass velocity develops, corresponding to a directed transport of the chain. This autonomous system can thus transform heath currents into motion. The model parameters can be tuned such that the particles exhibit a crossover from an ordered configuration on the substrate to a disordered one, the maximal motor effect being reached in such a disordered phase. In this case the manybody motor outperforms the single motor system, showing the great importance of collective effects in microscopic thermal devices. Such collective effects represent thus a free resource that can be exploited to enhance the dynamic and thermodynamic performances in microscopic machines.

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A. Imparato. 2021-03-02. Out-of-equilibrium Frenkel-Kontorova model. https://doi.org/10.1088/1742-5468%2Fabda2a

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