Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 25: Poster: Soft Matter Dynamics / Glasses

DY 25.3: Poster

Dienstag, 8. März 2016, 18:15–21:00, Poster B2

Dynamical coexistence in polydisperse hard spheres — •Matteo Campo and Thomas Speck — Institut für Physik, JGU Mainz, Germany

We investigate the slow dynamics of a model glass former, the polydisperse hard-sphere liquid, using a combination of molecular dynamics and importance sampling in the trajectory ensemble. According to dynamical facilitation theory, the glass transition takes place as a consequence of dynamical heterogeneity which develops as the liquid is quenched. We characterize dynamical heterogeneity by a parameter, the mobility, which quantifies how far particles move in the supercooled liquid. By studying trajectories longer than the structural relaxation time, we observe exponential tails in the probability distribution of mobility, which indicate phase coexistence of normal and exceptionally slow trajectories.