Abstract
Molecular dynamics results for the dynamic Prigogine-Defay ratio are presented for two glass-forming liquids, thus evaluating the experimentally relevant quantity for testing whether metastable-equilibrium liquid dynamics is described by a single parameter to a good approximation. For the Kob-Andersen binary Lennard-Jones mixture as well as for an asymmetric dumbbell model liquid, a single-parameter description works quite well. This is confirmed by time-domain results where it is found that energy and pressure fluctuations are strongly correlated on the alpha time scale in the constant-volume, constant-temperature ensemble; similarly, energy and volume fluctuations correlate strongly in the constant-pressure, constant-temperature ensemble.
Originalsprog | Engelsk |
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Tidsskrift | Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) |
Vol/bind | 77 |
Udgave nummer | 1 |
Antal sider | 5 |
ISSN | 1539-3755 |
DOI | |
Status | Udgivet - 2008 |