1205.5046 (Gianluca Calcagni)

Diffusion in multi-fractional spacetimes    [PDF]

Gianluca Calcagni

We study diffusion processes in anomalous spacetimes regarded as models of quantum geometry. Several types of diffusion equations and their solutions are presented and the associated stochastic processes are identified. These results are partly based on the literature in probability and percolation theory but their physical interpretation here is different since they apply to quantum spacetime itself. The case of multi-scale (in particular, multi-fractal) spacetimes is then considered through a number of examples and the most general spectral-dimension profile of multi-fractional spaces is constructed.

View original: http://arxiv.org/abs/1205.5046