Lattice QCD at finite isospin density and/or temperature

Details Lattice QCD at finite isospin density and/or temperature Lattice QCD at finite isospin density and/or temperature

2003-09-10

arxiv.org/abs/hep-lat/0309042v1

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages LaTex, 3 postscript figures. Parallel talk at Lattice2003(nonzero)

Scientific paper

10.1016/S0920-5632(03)02635-5

We simulate two-flavour lattice QCD with at a finite chemical potential $\mu_I$ for isospin, and finite temperature. At small $\mu_I$, we determine the position of the crossover from hadronic matter to a quark-gluon plasma as a function of $\mu_I$. At larger $\mu_I$ we observe the phase transition from the superfluid pion-condensed phase to a quark-gluon plasma, noting its change from second order to first order as $\mu_I$ is increased. We also simulate two-flavour lattice QCD at zero quark mass, using an action which includes an additional 4-fermion interaction, at temperatures close to the chiral transition on $N_t=8$ lattices.

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