出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The advantages of using Multi-Step corrections for simulations of lattice gauge theories with
dynamical fermions will be discussed. This technique is suited for algorithms based on the Multi-
Boson representation of the dynamical fermions as well as for the Hybrid Monte-Carlo (HMC)
algorithm and variants of the latter, like the Polynomial-HMC. Especially the latter has the power
to deal with an odd number of fermion fields—an essential feature necessary for realistic QCDsimulations
with up-, down-, and strange-quarks. In particular, we will discuss the application of
the multi-step (actually two-step) correction technique to a PHMC updating algorithm for twistedmass
Wilson fermions with non-degenerate fermion masses, as it was used in recent dynamical
simulations for Nf = 2+1+1 fermion flavors.
