Crossing bonds in the random-cluster model

Details Crossing bonds in the random-cluster model Crossing bonds in the random-cluster model

2009-03-27

arxiv.org/abs/0903.4729v1

Phys. Rev. E V79, 061112 (2009)

Physics

Condensed Matter

Statistical Mechanics

2 figures

Scientific paper

We derive the scaling dimension associated with crossing bonds in the random-cluster representation of the two-dimensional Potts model, by means of a mapping on the Coulomb gas. The scaling field associated with crossing bonds appears to be irrelevant, on the critical as well as on the tricritical branch. The latter result stands in a remarkable contrast with the existing result for the tricritical O(n) model that crossing bonds are relevant. In order to obtain independent confirmation of the Coulomb gas result for the crossing-bond exponent, we perform a finite-size-scaling analysis based on numerical transfer-matrix calculations.

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