A q-state frustrated Potts model is introduced which generalizes the Kasteleyn-Fortuin formalism to frustrated systems. For q = 2 the Ising spin is recovered. For q = 1 it gives the frustrated percolation model, which combines frustration and connectivity features and might be relevant to systems like gels of glasses. The solution on a decorated lattice shows that a line of critical temperatures T(p)(q) appears when frustration is introduced. T(p)(q) is the percolation temperature where the clusters used in the Swendsen and Wang dynamics diverge. The critical behaviour at T(p)(q) is found to be the same as the ferromagnetic q/2 state Potts model, implying the universality class of the ferromagnetic 1/2 state Potts model for frustrated percolation.
CLUSTER FORMULATION FOR FRUSTRATED SPIN MODELS
DE ARCANGELIS, Lucilla;
1993
Abstract
A q-state frustrated Potts model is introduced which generalizes the Kasteleyn-Fortuin formalism to frustrated systems. For q = 2 the Ising spin is recovered. For q = 1 it gives the frustrated percolation model, which combines frustration and connectivity features and might be relevant to systems like gels of glasses. The solution on a decorated lattice shows that a line of critical temperatures T(p)(q) appears when frustration is introduced. T(p)(q) is the percolation temperature where the clusters used in the Swendsen and Wang dynamics diverge. The critical behaviour at T(p)(q) is found to be the same as the ferromagnetic q/2 state Potts model, implying the universality class of the ferromagnetic 1/2 state Potts model for frustrated percolation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
