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Updated: Apr 15, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Stochastic dynamics of collective modes for Brownian dipoles
Leticia F Cugliandolo1, Pierre-Michel Déjardin2, Gustavo S Lozano3
1Laboratoire de Physique Théorique et Hautes Énergies, Sorbonne Universités, Université Pierre et Marie Curie-Paris 6, and UMR 7589 CNRS/P6, 4 place Jussieu, 75252 Paris cedex 05, France.
Abstract:
The individual motion of a colloidal particle is described by an overdamped Langevin equation. When rotational degrees of freedom are relevant, these are described by a corresponding Langevin process. Our purpose is to show that the microscopic local density of colloids, in terms of a space and rotation state, also evolves according to a Langevin equation. The latter can then be used as the starting point of a variety of approaches, ranging from dynamical density functional theory to mode-coupling approximations.
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