Mean-field-like variational and renormalisation group studies of (1+1)-dimensional spin models

E. Niebur, J. Solyom

Research output: Contribution to journalArticle

Abstract

Two recently proposed methods, the variational cluster wavefunction approximation and the mean-field-like renormalisation group transformation, are used to describe the phase transitions in the Hamiltonian version of the two-dimensional Z(q) symmetric spin models. The convergence of the two schemes to the known results is analysed. It is shown that in their usual form neither of these models can reproduce fine details of the phase diagram, although the renormalisation group method gives in general better convergence.

Original languageEnglish (US)
Article number037
Pages (from-to)2949-2959
Number of pages11
JournalJournal of Physics A: Mathematical and General
Volume20
Issue number10
DOIs
StatePublished - Dec 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Physics and Astronomy(all)

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