The low-lying energy-momentum spectrum for the four-Fermi model on a lattice

Petrus H. R. dos Anjos, Paulo A. Faria da Veiga

We obtain the low-lying energy-momentum spectrum for the imaginary-time lattice four-Fermi or Gross-Neveu model in $d+1$ space-time dimensions ($d=1,2,3$) and with $N$-component fe…