Methods of computer physics and their use in solving complex research-scientific problems

doc. RNDr. Michal Jaščur, CSc.
Institute of Physics,

PF UPJŠ, Košice, Slovakia

## Abstract

In this contribution we discuss two representative physical problems that illustrate some methods of computational physics. We concentrate on typical applications of the Monte Carlo simulation in condensed matter physics. At first we explain the principles of Monte Carlo strategy using the famous Metropolis algorithm for Ising model and afterwards we illustrate how this approach can be used to fit experimental data a real magnetic sample. Our second example concerns the theory of phase transition, where an application of the large scale Monte Carlo simulation led to new fundamental predictions regarding critical exponents α, α', γ. γ'.

**Keywords:** computational physics, Monte Carlo, Ising model, critical
exponents