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ID 14396
file
creator
JLQCD, Collaboration
Aoki, S
Fukugita, M
Hashimoto, S
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kaneko, T
Kumahashi, Y
Tsutsui, N
Ukawa, A
Yamada, N
Yoshie, T
subject
Lattice QCD
Dynamical QCD
Kogut–Susskind fermion
Algorithm
NDC
Physics
abstract
We propose an exact simulation algorithm for lattice QCD with dynamical Kogut–Susskind fermion in which the Nf-flavor fermion operator is defined as the Nf/4th root of the Kogut–Susskind (KS) fermion operator. The algorithm is an extension of the Polynomial Hybrid Monte Carlo (PHMC) algorithm to KS fermions. The fractional power of the KS fermion operator is approximated with a Hermitian Chebyshev polynomial, with which we can construct an algorithm for any number of flavors. The error which arises from the approximation is corrected by the Kennedy–Kuti noisy Metropolis test. Numerical simulations are performed for the two-flavor case for several lattice parameters in order to confirm the validity and the practical feasibility of the algorithm. In particular tests on a 16 4 lattice with a quark mass corresponding to mPS/mVnot, vert, similar0.68 are successfully accomplished. We conclude that our algorithm provides an attractive exact method for dynamical QCD simulations with KS fermions.
journal title
Computer Physics Communications
volume
Volume 155
issue
Issue 3
start page
183
end page
208
date of issued
2003-11
publisher
Elsevier B.V.
issn
0010-4655
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2003 Elsevier B.V.
relation is version of URL
http://dx.doi.org/10.1016/S0010-4655(03)00353-9
department
Graduate School of Science