DOI 10.1007/s100520000455
A new approach to the determination
of the critical couplings for a deconfinement phase transition
in the variational-cumulant expansion
1 Department of Physics, Nankai University, Tianjin 300071, P.R. China
2 CCAST (World Laboratory) P.O. Box 8730, 10080 Beijing, P.R. China
Received: 23 February 2000 / Revised version: 19 May 2000 /
Published online: 27 November 2000 - © Springer-Verlag
2000
Abstract
Based on the variational-cumulant expansion (VCE),
a new approach is adopted to
determine the critical couplings for the deconfinement phase transition in
SU(2) gauge theory for
,
and with both the standard Wilson
action and the improved tree-level Symansik action.
New results of the VCE which are
close to the data of Monte Carlo (MC) simulations
make manifest that the new approach
is much more effective than the traditional one
and show the consistence of a VCE
analysis with an MC simulation.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
