Asymptotic formulas for the resonances of the cubic anharmonic oscillator in both the regimes of small and large coupling constant g are derived. In addition, a numerical calculation is carried out to give a complete graphical picture of the behavior of the resonance eigenvalues over the whole range of g.

• Received 29 December 1987

DOI:https://doi.org/10.1103/PhysRevA.37.4079