Accelerated dynamics with the dynamical activation-relaxation technique

Details Accelerated dynamics with the dynamical activation-relaxation technique Accelerated dynamics with the dynamical activation-relaxation technique

2004-04-06

arxiv.org/abs/cond-mat/0404128v1

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

The dynamics of many atomic systems is controlled by activated events taking place on a time scale which is long compared to that associated with thermal vibrations. This often places problems of interest outside the range of standard simulation methods such as molecular dynamics. We present here an algorithm, the dynamical activation-relaxation technique (DART), which slows down thermal vibrations, while leaving untouched the activated processes which constitute the long-time dynamics. As an example, we show that it is possible to accelerate considerably the dynamics of self-defects in a 1000-atom cell of c-Si over a wide range of temperatures.

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