Simple renormalisation group method for calculating thermal equations of states
- 11 July 1987
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 20 (10) , L665-L672
- https://doi.org/10.1088/0305-4470/20/10/008
Abstract
Renormalisation group (RG) techniques are currently used to derive relevant quantities in the vicinity of the critical point. The authors present a real space RG procedure which directly yields the order parameter for all values of the external parameters (e.g. temperature). It is as simple as a mean-field calculation, although it provides non-trivial results, which can be systematically improved. The method is successfully illustrated on the square lattice Potts ferromagnet. The whole approach suggests that the order parameter on a hierarchical lattice is, on every site, proportional to its coordination number.Keywords
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