Radiative transfer theory for vacuum fluctuations

Details Radiative transfer theory for vacuum fluctuations Radiative transfer theory for vacuum fluctuations

1999-07-06

arxiv.org/abs/cond-mat/9907080v2

Phys. Rev. Lett. 83, 5475 (1999)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, revised version according to referee's comments

Scientific paper

10.1103/PhysRevLett.83.5475

A semiclassical kinetic theory is presented for the fluctuating photon flux emitted by a disordered medium in thermal equilibrium. The kinetic equation is the optical analog of the Boltzmann-Langevin equation for electrons. Vacuum fluctuations of the electromagnetic field provide a new source of fluctuations in the photon flux, over and above the fluctuations due to scattering. The kinetic theory in the diffusion approximation is applied to the super-Poissonian noise due to photon bunching and to the excess noise due to beating of incident radiation with the vacuum fluctuations.

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