# Nonlocal Transport of Heat in Equilibrium Drift-Diffusion Systems

Florian Stäbler, Eugene Sukhorukov

Florian Stäbler, Eugene Sukhorukov

**4/7/22**Published in : arXiv:2207.01676

The amount of heat an integer quantum Hall edge state can carry in equilibrium is quantized in universal units of the heat flux quantum J_q= \frac{\pi k_B^2}{12 \hbar}T^2 per edge state. We report a heat enhancement effect in edge states interacting with ohmic reservoirs in the presence of nonlocal interactions or chirality breaking diffusive currents. In contrast to a non equilibrium, nonlinear drag effect, we report an equilibrium, linear phenomenon. The chirality of the edge states creates additional correlations between the reservoirs, reflected in a higher than quantum heat flux in the chiral channel. We show that for different types of coupling the enhancement can be understood as static or dynamical backaction of the reservoirs on the chiral channel. We show that our results qualitatively hold by replacing the dissipative ohmic reservoirs by an energy conserving mesoscopic capacitor and consider the respective transmission lines for different types of interaction.