New quasi-exactly solvable class of generalized isotonic oscillators
  We introduce a new family of quasi-exactly solvable generalized isotonic oscillators which are based on the pseudo-Hermite exceptional orthogonal polynomials. We obtain exact closed-form expressions for the energies and wavefunctions as well as the allowed potential parameters for the first two members of the family using the Bethe ansatz method. Numerical calculations of the energies reveal that member potentials have multiple quasi-exactly solvable eigenstates and the number of states for higher members are parameter dependent. 
Davids Agboola, Jon Links, Ian Marquette, Yao-Zhong Zhang
math-ph math.MP nlin.SI quant-ph