Nonequilibrium Stefan-Boltzmann law

Details Nonequilibrium Stefan-Boltzmann law Nonequilibrium Stefan-Boltzmann law

2010-02-03

arxiv.org/abs/1002.0794v2

Physics

Condensed Matter

Statistical Mechanics

9 pages, 1 figure. To be published in J. Noneq. Therm

Scientific paper

We study thermal radiation outside equilibrium. The situation considered consists of two bodies emitting photons at two different temperatures. We show that the system evolves to a stationary state characterized by an energy current which satisfies a Stefan-Boltzmann-like law expressing it as the difference of the temperatures to the fourth power of the emitters . The results obtained show how the classical laws governing the thermal radiation at equlibrium can be generalized away from equilibrium situations.

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