Non-perturbative calculations of a global U(1) theory at finite density and temperature

Details Non-perturbative calculations of a global U(1) theory at finite density and temperature Non-perturbative calculations of a global U(1) theory at finite density and temperature

2000-08-29

arxiv.org/abs/hep-ph/0008307v1

Nucl.Phys. B598 (2001) 578-600

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 11 figures

Scientific paper

10.1016/S0550-3213(00)00753-7

We use an optimised hopping parameter expansion for the free energy (linear delta expansion) to study the phase transitions at finite temperature and finite charge density in a global U(1) scalar Higgs sector on the lattice at large lattice couplings. We are able to plot out phase diagrams in lattice parameter space and find that the standard second-order phase transition with temperature at zero chemical potential becomes first order as the chemical potential increases.

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