Generalized Crossover in multiparameter Hamiltonians

Details Generalized Crossover in multiparameter Hamiltonians Generalized Crossover in multiparameter Hamiltonians

2001-03-29

arxiv.org/abs/cond-mat/0103598v2

Phys.Rev. E64 (2001) 047104

Physics

Condensed Matter

Statistical Mechanics

4 pages, 1figure

Scientific paper

10.1103/PhysRevE.64.047104

Many systems near criticality can be described by Hamiltonians involving several relevant couplings and possessing many nontrivial fixed points. A simple and physically appealing characterization of the crossover lines and surfaces connecting different nontrivial fixed points is presented. Generalized crossover is related to the vanishing of the RG function $Z_t^{-1}$. An explicit example is discussed in detail based on the tetragonal GLW Hamiltonian.

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