instead of the perturbation being switched linearly, it was switched on and off exponentially and slowly, the switching off commencing long after the switching on was complete. Calculate the probabilities, long after the perturbation has been extinguished, of the 2pz-orbital being occupied, the initial states being as in Problem 6.18.
Problem
An electric field in the z-direction is increased linearly from zero. What is the probability that a hydrogen atom, initially in the ground state, will be found with its electron in a 2pz-orbital at a time t?