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New One-Flavor Hybrid Monte Carlo Simulation Method for Lattice Fermions with gamma-five Hermiticity

By Kenji Ogawa

Abstract

We propose a new method for Hybrid Monte Carlo (HMC) simulations with odd numbers of dynamical fermions on the lattice. It employs a different approach from polynomial or rational HMC. In this method, gamma-five hermiticity of the lattice Dirac operators is crucial and it can be applied to Wilson, domain-wall, and overlap fermions. We compare HMC simulations with two degenerate flavors and (1 + 1) degenerate flavors using optimal domain-wall fermions. The ratio of the efficiency, (number of accepted trajectories) / (simulation time), is about 3:2. The relation between pseudofermion action of chirally symmetric lattice fermions in four-dimensional(overlap) and five-dimensional(domain-wall) representation are also analyzed.Comment: 13 page

Topics: High Energy Physics - Lattice
Year: 2011
DOI identifier: 10.1016/j.physletb.2011.09.023
OAI identifier: oai:arXiv.org:1104.2255
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