The validity of Haldane’s conjecture entails that the mass gap of the two-dimensional O(3) nonlinear sigma model with a \theta term must tend to zero as \theta approaches the value \pi by following a precise law. In the present paper we extract the related critical exponents by simulating the model at imaginary \theta.

Behavior near theta = pi of the mass gap in the two-dimensional O(3) nonlinear sigma model

PAPA, Alessandro
2014-01-01

Abstract

The validity of Haldane’s conjecture entails that the mass gap of the two-dimensional O(3) nonlinear sigma model with a \theta term must tend to zero as \theta approaches the value \pi by following a precise law. In the present paper we extract the related critical exponents by simulating the model at imaginary \theta.
2014
Mass gap in two-dimensional topological models; Critical exponents; Monte Carlo lattice simulations
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/138211
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