Autori: Federico Bonetto, Vieri Mastropietro
Titolo: Critical indices for the Youkawa2 quantum field theory
By renormalization group methods we obtain non perturbative results
about a d=1 system of interacting spinless fermions in a periodic
potential, if the conduction band is filled. Both the strength of the
interaction and the amplitude of the periodic potential are assumed
small. We obtain that the large distance asymptotic behavior of the
two-point Schwinger function is anomalous and described by two
critical indices, explicitly computed by convergent series, related to
the renormalization of the spectral gap and of the discontinuity at
the Fermi surface.
Ref: MF96-11, mp_arc@math.utexas.edu #96-371
posta-e : bonetto@ipparco.roma1.infn.it
vieri@ipparco.roma1.inf