Many-body radiative heat transfer theory
Philippe Ben-Abdallah, Svend-Age Biehs, and Karl Joulain

TL;DR
This paper develops a comprehensive N-body theory for radiative heat transfer among multiple finite objects, revealing significant many-body effects that enhance heat flux beyond pairwise interactions, applicable to complex mesoscopic systems.
Contribution
It extends the Polder and van Hove formalism to multiple objects, providing a new framework for analyzing photon heat transport in complex, non-equilibrium systems.
Findings
Strong exaltation effects of heat flux due to many-body interactions
Extension of existing two-body models to N-body systems
Framework applicable to mesoscopic-scale complex systems
Abstract
In this Letter a N-body theory for the radiative heat exchange in thermally non equilibrated discrete systems of finite size objects is presented. We report strong exaltation effects of heat flux which can be explained only by taking into account the presence of many body interactions. Our theory extends the standard Polder and van Hove stochastic formalism used to evaluate heat exchanges between two objects isolated from their environment to a collection of objects in mutual interaction. It gives a natural theoretical framework to investigate the photon heat transport properties of complex systems at mesoscopic scale.
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