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Fluctuations in a diffusive medium with gain

By Stefano Lepri


We present a stochastic model for amplifying, diffusive media like, for instance, random lasers. Starting from a simple random-walk model, we derive a stochastic partial differential equation for the energy field with contains a multiplicative random-advection term yielding intermittency and power-law distributions of the field itself. Dimensional analysis indicate that such features are more likely to be observed for small enough samples and in lower spatial dimensions

Topics: Condensed Matter - Statistical Mechanics, Physics - Optics
Year: 2013
DOI identifier: 10.1103/PhysRevLett.110.230603
OAI identifier:

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