Symmetries and phase structure of the layered sine-Gordon model

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The phase structure of the layered sine-Gordon (LSG) model is investigated in terms of symmetry considerations by means of a differential renormalization group (RG) method, within the local potential approximation. The RG analysis of the general N-layer model provides us with the possibility of considering the dependence of the vortex dynamics on the number of layers. The Lagrangians are distinguished according to the number of zero eigenvalues of their mass matrices. The number of layers is found to be decisive with respect to the phase structure of the N-layer models, with neighbouring layers being coupled by terms quadratic in the field variables. It is shown that the LSG model with N layers undergoes a Kosterlitz-Thouless-type phase transition at the critical value of the parameter β2c ≤ 8Nπ. In the limit of infinitely many layers the LSG model can be considered as the discretized version of the three-dimensional sine-Gordon model which has been shown to have a single phase within the local potential approximation. The infinite critical value of the parameter β2c for the LSG model in the continuum limit (N → ∞) is consistent with the latter observation.

Original languageEnglish
Article numberS22
Pages (from-to)8119-8131
Number of pages13
JournalJournal of Physics A: Mathematical and General
Volume39
Issue number25
DOIs
Publication statusPublished - Jun 23 2006

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Symmetries and phase structure of the layered sine-Gordon model'. Together they form a unique fingerprint.

  • Cite this