Computing absolute free energies of disordered structures by molecular simulation

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• Prof Tanja Schilling (University of Luxembourg)
• Friday 26 February 2010, 12:00-13:00
• Unilever Lecture Theatre, Department of Chemistry.

If you have a question about this talk, please contact Dr Mark Miller.

We present a Monte Carlo simulation technique by which the free energy of disordered systems can be computed directly. It is based on thermodynamic integration. The central idea is to construct an analytically solvable reference system from a configuration which is representative for the state of interest. The method can be applied to lattice models (e.g., the Ising model) as well as off-lattice molecular models. We focus mainly on the more challenging off-lattice case. We propose a Monte Carlo algorithm, by which the thermodynamic integration path can be sampled efficiently. At the examples of the hard sphere liquid and a hard disk solid with a defect we discuss several properties of the approach. In the second part of the talk we will present results on the phase diagram and slow dynamics of suspensions of hard ellipsoids.

This talk is part of the Extra Theoretical Chemistry Seminars series.

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