"Finite temperature phase transition in SO(3) lattice gauge theory:
topology, spontaneous symmetry breaking and universality."
Relatore: Dr Giuseppe Burgio
School of Mathematics, Trinity College, Dublino.
5 Marzo 2002 - Ore 15.30
We investigate the phase structure of pure SU(2) LGT at
finite temperature in the adjoint representation modified
by a SO(3) invariant Z_2 monopole chemical potential.
The decoupling of a finite temperature phase transition
from the unphysical zero temperature bulk phase transitions
is obtained and analyzed with special emphasis on the
continuum limit, keeping an eye on its physical meaning
and on universality. An effective symmetry breaking
mechanism and a corresponding order parameter are proposed
in the context of the monopole picture of confinement.
Numerical results are presented for the Abelian projected
theory after maximally Abelian gauge fixing.