Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2000-10-09
Nucl.Phys.Proc.Suppl. 94 (2001) 675-678
Physics
High Energy Physics
High Energy Physics - Lattice
Lattice 2000 (Topics in Gauge Theories), 4 pages, 2 figures
Scientific paper
10.1016/S0920-5632(01)00875-1
We point out that the dynamical fermion mass generation in the 3D compact U(1) lattice gauge theory with charged fermion and scalar fields (chi-U-phi_3 model) may be of relevance for the spinon-holon theory with local gauge symmetry in the condensed matter physics. However, many properties of the model are uncertain, so we make some conjectures to motivate their future investigation. Most probably, for strong gauge coupling the model is by universality equivalent to the familiar 3D four-fermion coupling models with N_f=2. Available numerical results indicate that at the intermediate and weak gauge coupling two universality classes with new interesting physics may arise. One of them is associated with a tricritical point which probably exists in the phase diagram of the model. The other one is determined by the dynamical fermion mass generation in the compact QED_3, which is insufficiently understood but of much interest by itself.
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