The Schwinger Model in Point Form
  We attempt to solve the Schwinger model, i.e. massless QED in 1+1 dimensions, by quantizing it on a space-time hyperboloid x_\mu x^\mu =\tau^2. The Fock-space representation of the 2-momentum operator is derived and its algebraic structure is analyzed. We briefly outline a solution strategy. 
Daniel Kupelwieser, Wolfgang Schweiger, William H. Klink
hep-th nucl-th