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.File in questo prodotto:
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