Energy evolution of a general one-dimensional oscillator with a quadratic time-dependent stiffness and a linear time-dependent correlation parameter

We solve the time-dependent Schr & ouml;dinger equation describing a generalized harmonic oscillator in the coordinate representation with constant mass but time-dependent stiffness and correlation parameters. Exact solutions are obtained in terms of confluent hypergeometric functions or parabolic cylinder functions. The dynamics of mean energy is studied in several different regimes, including the special case of imaginary correlation parameter, corresponding to the non-Hermitian Ahmed-Swanson model. In this case, real time-dependent mean values of the Hamiltonian are obtained by using dual wave functions, evolving according to the time-dependent Schr & ouml;dinger equations with the given Hamiltonian and its Hermitially conjugated partner. The adiabatic evolution is considered as one of examples.