Thursday 27 Feb 2014Realizability problem for random particle systems

Tobias Kuna - University of Reading

Harrison 103 15:00-16:00

In order to describe complex particle systems effectively, one often concentrate on a few characteristics of the system, like density or structure function. The large number of remaining degrees of freedom one want to supress as subscale effects, that is, by deriving effective equations just in terms of these characteristics, namely moment closures like Percus-Yevick or hypernetted chain equation. A related question is if an effective description exists for pregiven
characteristics. Such putative characteristics cannot be predescribed independently from each other and not all putative choices may correspond to a complex particle system at all. A general introduction to this circle of problems is given.

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