Prof. Juan P. Garrahan, University of Nottingham: Statistical mechanics of slow dynamics: glasses and beyond
Vir: Ponedeljkov fizikalni kolokvij
Prof. Juan P. Garrahan
University of Nottingham
Statistical mechanics of slow dynamics: glasses and beyond
Povzetek / Abstract:
Systems which relax slowly and eventually fall out of equilibrium are widespread in classical (soft) condensed-matter. The paradigmatic example are liquids which when supercooled end up forming glasses. I will review the phenomenology of the glass transition, as the template for dynamical arrest in classical many-body systems more broadly. I will then address the question of how to describe this physics theoretically. I will focus on a perspective whereby complex slow relaxation is a consequence of (emergent) constrained dynamics. A key insight is that the interesting structure is not encountered in static configurations but in trajectories of the dynamics, which requires the use a ``statistical mechanics of trajectories'' based on the mathematics of large deviations. Slow dynamics is then seen as a consequence of phase transitions occurring in space-time (rather than in space as in the standard equilibrium case). I will also discuss the wider application of these concepts to other non-equilibrium systems, both classical and quantum.