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 language | English (US) |
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Article number | 037 |
Pages (from-to) | 2949-2959 |
Number of pages | 11 |
Journal | Journal of Physics A: Mathematical and General |
Volume | 20 |
Issue number | 10 |
DOIs | |
State | Published - Dec 1 1987 |
Externally published | Yes |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Mathematical Physics
- General Physics and Astronomy