Photon frequency diffusion process

Autor: Oliveira, Guilherme Eduardo Freire, Maes, Christian, Meerts, Kasper
Rok vydání: 2022
Předmět:
Zdroj: J Stat Phys 189, 4 (2022)
Druh dokumentu: Working Paper
DOI: 10.1007/s10955-022-02960-0
Popis: We introduce a stochastic multi-photon dynamics on reciprocal space. Assuming isotropy, we derive the diffusion limit for a tagged photon to be a nonlinear Markov process on frequency. The nonlinearity stems from the stimulated emission. In the case of Compton scattering with thermal electrons, the limiting process describes the dynamical fluctuations around the Kompaneets equation. More generally, we construct a photon frequency diffusion process which enables to include nonequilibrium effects. Modifications of the Planck Law may thus be explored, where we focus on the low-frequency regime.
Comment: 30 pages, 8 figures
Databáze: arXiv
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