Energy Landscapes of clusters, glasses, and biomolecules

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• David Wales (Dept. Chemistry, University of Cambridge)
• Monday 19 October 2009, 16:00-17:00
• Harker 2 lecture room, Department of Earth Sciences, Downing Site.

If you have a question about this talk, please contact Ian Farnan.

Coarse-graining the potential energy surface into the basins of attraction of local minima, provides a computational framework for investigating structure, dynamics and thermodynamics in molecular science and condensed matter. Steps between local minima form the basis for global optimisation via basin-hopping and for calculating thermodynamic properties using the superposition approach and basin-sampling. To treat global dynamics we must include transition states of the potential energy surface, which link local minima via steepest-descent paths. We may then apply the discrete path sampling method, which provides access to rate constants for rare events. In large systems the paths between minima with unrelated structures may involve hundreds of stationary points of the potential energy surface. New algorithms have been developed for both geometry optimisation and making connections between distant local minima, which allow us to treat such systems. Applications will be presented for a wide variety of atomic and molecular clusters, glass-formers and biomolecules.

This talk is part of the Mineral Sciences Seminars series.

This talk is included in these lists:

• Department of Earth Sciences seminars
• Harker 2 lecture room, Department of Earth Sciences, Downing Site
• Mineral Sciences Seminars

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