Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-10-25
PoSLAT2006:152,2006
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 6 figures. Talk presented at the XXIV International Symposium on Lattice Field Theory, July 23-28, 2006, Tuscon, Ariz
Scientific paper
We investigate the Gross-Neveu model on the lattice at finite temperature and chemical potential in the limit of an infinite number of fermion flavours. We check the universality of the continuum limit of staggered and overlap fermions at finite temperature and chemical potential. We show that at finite density a recently discovered phase of cold baryonic matter emerges as a baryon crystal from a spatially inhomogeneous fermion condensate. However, we also demonstrate that on the lattice, this new phase disappears at large coupling or in small volumes. Furthermore, we investigate unusual finite size effects that appear at finite chemical potential. Finally, we speculate on the implications of our findings for QCD.
Forcrand Philippe de
Wenger Urs
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