Force or work for electronic transition?

[ani4physics]

Hi all. This is my first post @ physics forum. For last two weeks I have been wondering about this problem: We all know that an atom or molecule subjected to a time-dependent perturbation makes electronic transition, and whether the transition is allowed or not depends on the transition moment of the atom/molecule and the frequency of the external field. My question is, what is the work done for any particular electronic transition and what is the force on the electrons for that transition. I have tried using Ehrenfest theorem for that, but kinda clueless right now. Any insight will be greatly appreciated.

 

[azntoon]

The work done for an electronic transition is the energy difference between the initial and final states. This energy difference is the energy needed to move the electron from its original state to the new state. The force on the electrons for the transition can be calculated by using the equation F = ma, where m is the mass of the electron and a is the acceleration of the electron.