The string tension at low T and the free energy of domain walls at high T can
be computed from one and the same observable. We show by explicit calculation
that domain walls in hot Z(2) gauge theory have good thermodynamical behaviour.
This is due to roughening of the wall, which expresses the restoration of
translational symmetry.Comment: Contributed paper to the proceedings of the second workshop on
Continuous Advances in QCD, ITP, University of Minnesota, Minneapolis,
Minnesota, USA, March 28-31, 1996. 11 pages, figures and style file are
appended in uuencoded gzip.tar.fil