Microrheology of supercooled liquids in terms of a continuous time random walk

Schroer, Carsten F. E.; Heuer, Andreas
March 2013
Journal of Chemical Physics;Mar2013, Vol. 138 Issue 12, p12A518
Academic Journal
Molecular dynamics simulations of a glass-forming model system are performed under application of a microrheological perturbation on a tagged particle. The trajectory of that particle is studied in its underlying potential energy landscape. Discretization of the configuration space is achieved via a metabasin analysis. The linear and nonlinear responses of drift and diffusive behavior can be interpreted and analyzed in terms of a continuous time random walk. In this way, the physical origin of linear and nonlinear response can be identified. Critical forces are determined and compared with predictions from literature.


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