Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2010-04-27
Phys. Rev. E 82, 021503 (2010)
Physics
Condensed Matter
Disordered Systems and Neural Networks
16 pages, 14 figures
Scientific paper
10.1103/PhysRevE.82.021503
We present molecular dynamics simulations of a model glass-forming liquid (the binary Kob-Anderson Lennard-Jones model) and consider the distributions of inherent energies and metabasins during aging. In addition to the typical protocol of performing a temperature jump from a high temperature to a low destination temperature, we consider the temporal evolution of the distributions after an 'up-jump', i.e. from a low to a high temperature. In this case the distribution of megabasin energies exhibits a transient two-peak structure. Our results can qualitatively be rationalized in terms of a trap model with a Gaussian distribution of trap energies. The analysis is performed for different system sizes. A detailed comparison with the trap model is possible only for a small system because of major averging effects for larger systems.
Diezemann Gregor
Dyre Jeppe C.
Gnan Nicoletta
Heuer Andreas
Rehwald Christian
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