Spectrum of the 2-Flavor Schwinger Model from the Heisenberg Spin Chain
  We study the strong coupling limit of the 2-flavor lattice Schwinger model in the Hamiltonian formalism using staggered fermions. We show that the problem of finding the low-lying states is equivalent to solving the Heisenberg antiferromagnetic spin chain. We find good agreement with the continuum theory. 
F. Berruto, G. Grignani, G. W. Semenoff and P. Sodano