A unified approach for exactly solvable potentials in quantum mechanics   using shift operators
  We present a unified approach for solving and classifying exactly solvable potentials. Our unified approach encompasses many well-known exactly solvable potentials. Moreover, the new approach can be used to search systematically for a new class of solvable potentials. 
Mo-Lin Ge, L.C. Kwek, Yong Liu, C.H. Oh and Xiang-Bin Wang