title: Diffusion in multiscale spacetimes.
abstract: We study diffusion processes in anomalous spacetimes regarded as models of quantum geometry. Several types of diffusion equation 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 multiscale (in particular, multifractal) spacetimes is then considered through a number of examples, and the most general spectral-dimension profile of multifractional spaces is constructed.
authors: Albert Einstein Institute, Max Planck Institute for Gravitational Physics, Am Mühlenberg 1, D-14476 Golm, Germany. calcagni@iem.cfmac.csic.es
authors: Gianluca
authors: G
authors: Calcagni
mesh_terms: D003198:Computer Simulation; D004058:Diffusion; D008956:Models, Chemical; D008958:Models, Molecular; D015233:Models, Statistical; D011789:Quantum Theory; D013269:Stochastic Processes