PhysRevE.75.040501.pdf (197.13 kB)
Dynamics in inhomogeneous liquids and glasses via the test particle limit
journal contribution
posted on 2014-10-08, 14:30 authored by Andrew ArcherAndrew Archer, Paul Hopkins, Matthias SchmidtWe show that one may view the self-part and the distinct-part of the van Hove dynamic correlation function
of a simple fluid as the one-body density distributions of a binary mixture that evolve in time according to
dynamical density functional theory. For a test case of soft-core Brownian particles the theory yields results for
the van Hove function that agree quantitatively with those of our Brownian dynamics computer simulations. At
sufficiently high densities the free energy landscape underlying the dynamics exhibits a barrier as a function of
the mean particle displacement, shedding new light on the nature of glass formation. For hard spheres confined
between parallel planar walls the barrier height oscillates in phase with the local density, implying that the
mobility is maximal between layers, which should be experimentally observable in confined colloidal
dispersions.
Funding
A.J.A. and P.H. are grateful for the support of EPSRC, and M.S. thanks the DFG for support through the SFB TR6/D3.
History
School
- Science
Department
- Mathematical Sciences
Published in
PHYSICAL REVIEW EVolume
75Issue
4Pages
? - ? (4)Citation
ARCHER, A.J., HOPKINS, P. and SCHMIDT, M., 2007. Dynamics in inhomogeneous liquids and glasses via the test particle limit. Physical Review E, 75 (4), 040501.Publisher
© The American Physical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2007Notes
This article was published in the journal, Physical Review E [© The American Physical Society].ISSN
1539-3755Publisher version
Language
- en