Dynamic decay and superadiabatic forces in the van Hove dynamics of bulk hard sphere fluids

Author:

Treffenstädt Lucas L.1,Schindler Thomas2,Schmidt Matthias1

Affiliation:

1. University of Bayreuth

2. University of Erlangen-Nuremberg

Abstract

We study the dynamical decay of the van Hove function of Brownian hard spheres using event-driven Brownian dynamics simulations and dynamic test particle theory. Relevant decays mechanisms include deconfinement of the self particle, decay of correlation shells, and shell drift. Comparison to results for the Lennard-Jones system indicates the generality of these mechanisms for dense overdamped liquids. We use dynamical density functional theory on the basis of the Rosenfeld functional with self interaction correction. Superadiabatic forces are analysed using a recent power functional approximation. The power functional yields a modified Einstein long-time self diffusion coefficient in good agreement with simulation data.

Funder

Deutsche Forschungsgemeinschaft

Publisher

Stichting SciPost

Subject

General Physics and Astronomy

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Perspective: How to overcome dynamical density functional theory;Journal of Physics: Condensed Matter;2023-04-19

2. Perspective: New directions in dynamical density functional theory;Journal of Physics: Condensed Matter;2022-12-13

3. Force density functional theory in- and out-of-equilibrium;Physical Review E;2022-07-12

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