Superintegrable Deformations of the Smorodinsky-Winternitz Hamiltonian
  A constructive procedure to obtain superintegrable deformations of the classical Smorodinsky-Winternitz Hamiltonian by using quantum deformations of its underlying Poisson sl(2) coalgebra symmetry is introduced. Through this example, the general connection between coalgebra symmetry and quasi-maximal superintegrability is analysed. The notion of comodule algebra symmetry is also shown to be applicable in order to construct new integrable deformations of certain Smorodinsky-Winternitz systems. 
Angel Ballesteros Francisco J. Herranz, Fabio Musso and Orlando   Ragnisco