de Forcrand, Philippe
- Conference Paper
Rights / licenseCreative Commons Attribution 3.0 Unported
The 2d Heisenberg model - or 2d O(3) model - is popular in condensed matter physics, and in particle physics as a toy model for QCD. Along with other analogies, it shares with 4d Yang-Mills theories, and with QCD, the property that the configurations are divided in topological sectors. In the lattice regularisation the topological charge Q can still be defined such that Q ϵ. It has generally been observed, however, that the topological susceptibility Xt = 〈Q2〉 /V does not scale properly in the continuum limit, i.e. that the quantity Xtξ2 diverges for ξ → ∞ (where ξ is the correlation length in lattice units). Here we address the question whether or not this divergence persists after the application of the Gradient Flow Show more
Journal / seriesJournal of Physics. Conference Series
Pages / Article No.
PublisherInstitute of Physics
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