Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1994-04-13
Phys.Lett. B331 (1994) 400-410
Physics
High Energy Physics
High Energy Physics - Lattice
13pages+7figures, CERN-TH-7222/94 One reference added, else unchanged
Scientific paper
10.1016/0370-2693(94)91071-5
Deconfinement and screening of higher-representation sources in finite-temperature $SU(2)$ lattice gauge theory is investigated by both analytical and numerical means. The effective Polyakov-line action at strong coupling is simulated by an efficient cluster-updating Monte Carlo algorithm for the case of $d\!=\!4$ dimensions. The results compare very favourably with an improved mean-field solution. The limit $d\!\to\!\infty$ of the $SU(2)$ theory is shown to be highly singular as far as critical behaviour is concerned. In that limit the leading amplitudes of higher representation Polyakov lines vanish at strong coupling, and subleading exponents become dominant. Each of the higher-representation sources then effectively carry with them their own critical exponents.
Damgaard Poul H.
Hasenbusch Martin
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