Study of the Coulomb-Higgs transition in the Abelian Higgs Model

Details Study of the Coulomb-Higgs transition in the Abelian Higgs Model Study of the Coulomb-Higgs transition in the Abelian Higgs Model

1997-08-19

arxiv.org/abs/hep-lat/9708011v1

Phys.Lett. B416 (1998) 163-168

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, Latex, epsfig, uuencoded gzipped tar file, 4 figures included

Scientific paper

10.1016/S0370-2693(97)01295-1

The order of the Coulomb-Higgs transition in the U(1)-Higgs model with unfrozen modulus of the scalar field is studied. Large lattices (up to $24^4$ in one case) and high statistics are used. We fix $\beta =1.15$ and explore specially a region of $\lambda$-values where metastability is observed. We study the thermodynamical limit of several observables, in particular, the latent heat, the specific heat, the decrement of the free energy between the maxima and the central minimum of the two-peaked histogram, the Binder cumulant and the displacement of the critical coupling with the lattice size. The results point towards a second order transition for $\lambda \gtrsim 0.005$, while for smaller values of $\lambda$ the strong metastability growing with the lattice size seems to derive from a first order character.

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