DOI 10.1007/s1005298000897
String tension and thermodynamics with tree level
and tadpole improved actions
B. Beinlich - F. Karsch - E. Laermann - A. Peikert
Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
Received: 20 March 1998 / Published online: 2 June 1998
Abstract
We calculate the string tension, deconfinement transition
temperature and bulk
thermodynamic quantities of the SU(3) gauge theory using
tree level and tadpole improved actions.
Finite temperature calculations have been performed on lattices
with temporal extent 
and 4. Compared to calculations
with the standard Wilson action on this size lattices we observe
a drastic reduction of the cut-off dependence of bulk thermodynamic
observables at high temperatures. In order to test the influence of
improvement on long-distance observables at Tc we determine the
ratio 
.For all actions, including the standard Wilson action, we find results which
differ only little from each other.
We do, however, observe an improved asymptotic scaling behaviour
for the tadpole improved action compared to the Wilson and tree
level improved actions.
Copyright Springer-Verlag
