Sampling constraints in average: The example of Hugoniot curves

Details Sampling constraints in average: The example of Hugoniot curves Sampling constraints in average: The example of Hugoniot curves

2008-07-03

arxiv.org/abs/0807.0558v3

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We present a method for sampling microscopic configurations of a physical system distributed according to a canonical (Boltzmann-Gibbs) measure, with a constraint holding in average. Assuming that the constraint can be controlled by the volume and/or the temperature of the system, and considering the control parameter as a dynamical variable, a sampling strategy based on a nonlinear stochastic process is proposed. Convergence results for this dynamics are proved using entropy estimates.As an application, we consider the computation of points along the Hugoniot curve, which are equilibrium states obtained after equilibration of a material heated and compressed by a shock wave.

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