PT invariant Non-Hermitian Potentials with Real QES Eigenvalues

Avinash Khare, Bhabani Prasad Mandal

We show that at least the quasi-exactly solvable eigenvalues of the Schrödinger equation with the potential $V(x)=-(\zeta \cosh 2x-iM{)}^2$ as well as the periodic potential $V(x) = (ζ…