The Hamiltonian for this case is:
Given that you start in state |a>, what is the time-dependent probability of ending up in state |b>?
Frequency splitting:
Rabi frequency:
Note here I have expressed energy as inverse time. E/hbar
Define a time grid:
Calculate probabilities for different values of the coupling: V/Δ = 0.1, 0.5, 1, 5