Phenomenological Renormalization Group and Cluster Approximation

Authors

  • O. Borisenko Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
  • V. Chelnokov Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
  • V. Kushnir Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine

DOI:

https://doi.org/10.15407/ujpe59.07.0655

Keywords:

phenomenological renormalization group, transfer matrix, Potts model

Abstract

We propose a modification of the Nightingale renormalization group for lattice spin and gauge models by combining it with the cluster decimation approximation. Essential ingredients of our approach are: 1) exact calculation of the partition and correlation functions on a finite lattice strip; 2) preservation of the mass gap or the second moment correlation length, computed in the infinite strip length limit, on each decimation step. The method is applied to studying the general two- and three-dimensional Z(N) models. A perfect agreement with exact results (whenever available) is found. An extension of the method to models with a continuous symmetry is briefly discussed.

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Published

2018-10-24

How to Cite

Borisenko, O., Chelnokov, V., & Kushnir, V. (2018). Phenomenological Renormalization Group and Cluster Approximation. Ukrainian Journal of Physics, 59(7), 655. https://doi.org/10.15407/ujpe59.07.0655

Issue

Section

Fields and elementary particles