Improved lattice QCD with quarks: the 2 dimensional case
  QCD in two dimensions is investigated using the improved fermionic lattice Hamiltonian proposed by Luo, Chen, Xu, and Jiang. We show that the improved theory leads to a significant reduction of the finite lattice spacing errors. The quark condensate and the mass of lightest quark and anti-quark bound state in the strong coupling phase (different from t'Hooft phase) are computed. We find agreement between our results and the analytical ones in the continuum. 
Jun-Qin Jiang, Xiang-Qian Luo, Zhong-Hao Mei, Hamza Jirari, Helmut   Kr\"oger, and Chi-Min Wu