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Many out-of-equilibrium systems undergo an instability when an order parameter is suitably tuned, giving rise to well known and widespread processes: growth, convection, phase separation, and so on. A common feature is the emergence of a nontrivial spatial structure, whose typical scale L may display different dynamics. We are specially interested in understanding when L increases in time (coarsening process) and how. Using a continuum modelling and a multiscale approach, for several equations we are able to obtain a phase diffusion equation describing the dynamics of the emerging pattern and to predict when and how coarsening proceeds.

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Dr. Paolo Politi, Istituto dei Sistemi Complessi, Firenze
Seminarraum Theoretische Physik
Contact: not specified