Made available in DSpace on 2022-04-28T20:00:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-03-01; We present explicit numerical evidence of reflection-positivity violation for the lattice Landau gluon propagator in three-dimensional pure SU(2) gauge theory. We use data obtained at very large lattice volumes (V = 80<sup>3</sup>, 140<sup>3</sup>) and for three different lattice couplings in the scalin...
Made available in DSpace on 2022-04-28T20:13:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-05; We consider the critical short-time evolution of magnetic and droplet-percolation order parameters for the Ising model in two and three dimensions, through Monte Carlo simulations with the (local) heat-bath method. We find qualitatively different dynamic behaviors for the two types of order parameters. ...