Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1999-09-21
Phys.Rev. D62 (2000) 054512
Physics
High Energy Physics
High Energy Physics - Lattice
18 pages, 10 figures included
Scientific paper
10.1103/PhysRevD.62.054512
Adding separate chemical potentials lambda and gamma for Z2 monopoles and vortices respectively in the Villain form of the mixed fundamental-adjoint action for the SU(2) lattice gauge theory, we investigate their role in the interplay between the deconfinement and bulk phase transitions using Monte Carlo techniques. Setting lambda to be nonzero, we find that the line of deconfinement transitions is shifted in the coupling plane but it behaves curiously also like the bulk transition line for large enough adjoint coupling, as for lambda=0. In a narrow range of couplings, however, we find separate deconfinement and bulk phase transitions on the same lattice for nonzero and large lambda, suggesting the two to be indeed coincident in the region where a first order deconfinement phase transition is seen. In the limit of large lambda and gamma, we obtain only lines of second order deconfinement phase transitions, as expected from universality.
Datta Saumen
Gavai Rajiv V.
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