Numerical Experiments

Abstract

Out of the many different microscopic interaction models used in computer studies of phase transitions and ordering processes, only a small number of models are claimed to be quantitatively realistic models of specific physical systems. In this chapter, we shall present three of these models which are realistic in the sense that not only do they produce the correct symmetry properties of the various ordered phases but they also contain the appropriate energetics. Thus, the results of computer studies of these models often permit a quantitative comparison with laboratory experiments. In particular, Monte Carlo simulations of the models may be considered numerical experiments which provide additional experimental information.