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Computation of latent heat in the system of multi-component order parameter : 3D Ashkin-Teller model

Jeziorek-Knioła D., Wojtkowiak Z., Musiał G.

Computational Methods in Science and Technology

2019

Vol. 25, No. 1

31--39

The method for computing the latent heat in a system with many independently behaving components of the order parameter proposed previously is presented for a chosen point of the phase diagram of the 3D Ashkin-Teller (AH) model. Binder, Challa, and Lee-Kosterlitz cumulants are exploited and supplemented by the use of the energy distribution histogram. The proposed computer experiments using the Metropolis algorithm calculate the cumulants in question, the internal energy and its partial contributions as well as the energy distribution for the model Hamiltonian and its components. The important part of our paper is an attempt to validate the results obtained by several independent methods.