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arXiv · 1907.07555

Heat flux direction controlled by power-law oscillators under non-Gaussian fluctuations

E. H. Colombo·L. A. C. A. Defaveri·C. Anteneodo
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Abstract

Chains of particles coupled through anharmonic interactions and subject to non-Gaussian baths can exhibit paradoxical outcomes such as heat currents flowing from colder to hotter reservoirs. Aiming to explore the role of generic non-harmonicities in mediating the contributions of non-Gaussian fluctuations to the direction of heat propagation, we consider a chain of power-law oscillators, with interaction potential $V(x) \propto |x|^\alpha$, subject to Gaussian and Poissonian baths at its ends. Performing numerical simulations and addressing heuristic considerations, we show that a deformable potential has bidirectional control over heat flux.

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E. H. Colombo, L. A. C. A. Defaveri, C. Anteneodo. 2019-07-17. Heat flux direction controlled by power-law oscillators under non-Gaussian fluctuations. https://doi.org/10.1103/physreve.100.032118

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