We investigate the critical slowing down of the topological modes using local updating algorithms in lattice 2d CpN-1 models. We show that the topological modes experience a critical slowing down that is much more severe than the one of the quasi-Gaussian modes relevant to the magnetic susceptibility, which is characterized by tau(mag) similar to 7 with z approximate to 2. We argue that this may be a general feature of Monte Carlo simulations of lattice theories with non-trivial topological properties, such as QCD, as also suggested by recent Monte Carlo simulations of 4d SU(N) lattice gauge theories. (C) 2004 Published by Elsevier B.V.
|Autori:||Del Debbio L; Manca GM; Vicari E|
|Titolo:||Critical slowing down of topological modes|
|Anno del prodotto:||2004|
|Digital Object Identifier (DOI):||10.1016/j.physletb.2004.05.038|
|Appare nelle tipologie:||1.1 Articolo in rivista|