出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We launched a project to perform dymanical fermion simulations using the overlap fermion formulation
for sea quarks. In order to avoid the appearance of near-zero modes of the hermitian
Wilson-Dirac operator HW, we introduce a pair of extra Wilson fermions with a large negative
mass term. Crossing of the topological boundary is then strictly prohibited, and the topological
charge is conserved during simulations. It makes the simulations substantially faster compared
to the algorithms which allow for a change in topological change. We discuss the finite volume
effects due to the fixed global topology.
