Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1996-07-03
Nucl.Phys.Proc.Suppl. 53 (1997) 503-505
Physics
High Energy Physics
High Energy Physics - Lattice
5 pages, LaTeX, 3 figures, uuencoded, Talk presented at LATTICE96(topology)
Scientific paper
10.1016/S0920-5632(96)00700-1
Our study of the energy distribution has shown that the strength of the first order transition in the four-dimensional compact U(1) lattice gauge theory decreases when the coupling $\lambda$ of the monopole term increases. The disappearance of the energy gap for sufficiently large values of $\lambda$ indicates that the transition ultimately becomes of second order. In our present investigation, based on a finite-size analysis, we show that already at $\lambda= 0.9$ the critical exponent is characteristic of a second-order transition. Interestingly, this exponent turns out to be definitely different from that of the Gaussian case. We observe that the monopole density becomes constant in the second order region. In addition we find the rather surprising result that the phase transition persists up to very large values of $\lambda$, where the transition moves to (large) negative $\beta$.
Kerler Werner
Rebbi Claudio
Weber Axel
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