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

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.

arXiv comment6 pages, 4 figures

References in corpus (20)

• The Entropy Production Fluctuation Theorem and the Nonequilibrium Work Relation for Free Energy Differences
• Brownian motors: noisy transport far from equilibrium
• Brownian Carnot engine
• Quantum engine efficiency bound beyond the second law of thermodynamics
• Heat conduction in one dimensional nonintegrable systems
• Run-and-tumble particle in one-dimensional confining potential: Steady state, relaxation and first passage properties
• Heat transport in low dimensions: introduction and phenomenology
• On the universality of anomalous one-dimensional heat conductivity
• Heat conduction in the α-β-Fermi-Pasta-Ulam chain
• Brownian ratchet in a thermal bath driven by Coulomb friction
• Heat conductivity in linear mixing systems
• Minimal Model of Stochastic Athermal Systems: Origin of Non-Gaussian Noise
• Stochastic Energetics for Non-Gaussian Processes
• Heat conduction induced by non-Gaussian athermal fluctuations
• Role of the range of the interactions in thermal conduction
• A violation of universality in anomalous Fourier's law
• Fourier law from a chain of coupled anharmonic oscillators under energy conserving noise
• The role of the nature of the noise in the thermal conductance of mechanical systems
• Granular rotor as a probe for a non-equilibrium bath
• Driven power-law oscillator

Cited by in corpus (3)

• Rectification of energy and motion in non-equilibrium parity violating metamaterials
• Energy rectification in active gyroscopic networks under time-periodic modulations
• Approaching the perfect diode limit through a nonlinear interface