  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.
