Hello! I am reading Griffiths book on QM and in the chapter about the adiabatic approximation he introduces the Aharonov-Bohm effect. I am not sure why is this effect an example of adiabatic approximation. The hamiltonian doesn't depend on time as the vector potential is not a function of time so I don't really see how does this fit in the chapter. Griffiths mentions, indeed, that the same effect holds even when the vector potential depends on time, but again, there is nothing mentioned about slow change (which is required for the adiabatic approximation to hold). Can someone explain to me what is Griffiths actually doing there? Thank you!