Dynamics in inhomogeneous liquids and glasses via the test particle limit Export

@article{citeulike:1702655, abstract = {We 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.}, author = {Archer, Andrew J. and Hopkins, Paul and Schmidt, Matthias}, citeulike-article-id = {1702655}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000075000004040501000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRE/v75/e040501}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevE.75.040501}, doi = {10.1103/PhysRevE.75.040501}, journal = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, keywords = {binary, confinement, dyn-het, glass, simulation, theory}, number = {4}, pages = {040501}, posted-at = {2009-08-05 19:40:12}, priority = {2}, publisher = {APS}, title = {Dynamics in inhomogeneous liquids and glasses via the test particle limit}, url = {http://dx.doi.org/10.1103/PhysRevE.75.040501}, volume = {75}, year = {2007} }

TY - JOUR ID - citeulike:1702655 L3 - citeulike-article-id:1702655 N2 - We 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. IS - 4 JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) EP - 040501 TI - Dynamics in inhomogeneous liquids and glasses via the test particle limit PB - APS VL - 75 SP - 040501 KW - binary KW - confinement KW - dyn-het KW - glass KW - simulation KW - theory AU - Archer, Andrew AU - Hopkins, Paul AU - Schmidt, Matthias PY - 2007/// UR - http://dx.doi.org/10.1103/PhysRevE.75.040501 ER -