title: Testing trivializing maps in the Hybrid Monte Carlo algorithm.
abstract: We test a recent proposal to use approximate trivializing maps in a field theory to speed up Hybrid Monte Carlo simulations. Simulating the CPN-1 model, we find a small improvement with the leading order transformation, which is however compensated by the additional computational overhead. The scaling of the algorithm towards the continuum is not changed. In particular, the effect of the topological modes on the autocorrelation times is studied.
authors.affiliation: Institut für Physik, FB Theoretische Physik, Universität Graz, A-8010 Graz, Austria.
authors.forename: Georg P
authors.initials: GP
authors.lastname: Engel
authors.forename: Stefan
authors.initials: S
authors.lastname: Schaefer