BOUND-STATES OF THE PERTURBED SCHRODINGER SYSTEMS

A bound state of the Schrodinger system is disturbed by an additional potential. It is shown that the system is still in a bound state if an d only if its energy correction is restricted to the corresponding val ue. This infers some previous series solutions in quantum mechanics to be unbound states for the order i > 1 of perturbation. The corrected bound states of the system are given and their physical meaning is dis cussed simply. Application of the method to Stark effect reveals its a dvantage for researches of quantum chaos.