Fermion propagator in an external potential and generalized Airy functions

We study the behavior of the fermion propagator in an external time-dependent potential in 0 + 1 dimension. We show that, when the potential has up to quadratic terms in time, the propagator can be expressed in terms of generalized Airy functions (or standard Airy functions depending on the exact time dependence). We study various properties of these new generalized functions which reduce to the standard Airy functions in a particular limit.