1208.5891 (Stefano Lepri)

Fluctuations in a diffusive medium with gain    [PDF]

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.

View original: http://arxiv.org/abs/1208.5891