Coarse graining the phi 4 model: Landau-Ginzburg potentials from computer simulations

Autor(en)

Andreas Tröster, Christoph Dellago

Abstrakt

We discuss the problem of how to calculate Landau and Landau-Ginzburg free energies for lattice spin models from computer simulations. In setting up a proper simulation algorithm, emphasis is placed on the coarse grained nature of these potentials, which must be take into account by any suitable simulation approach. The development of theory and simulation results is reviewed and the results of a novel Monte Carlo algorithm using Fourier amplitudes are presented, which partly confirm and sharpen the assumptions on the temperature behavior of the Landau-Ginzburg coefficients made in the literature.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Journal

Ferroelectrics

Band

354

Seiten

225-237

Anzahl der Seiten

13

ISSN

0015-0193

DOI

https://doi.org/10.1080/00150190701454982

Publikationsdatum

2007

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/2733c657-eba4-45a3-b444-689996abdfb1