Excitation of the 0->1 transition in a quantum oscillator under the action of an electromagnetic pulse of the Gaussian form

The paper is devoted to the study of the features of excitation of a harmonic quantum oscillator without damping by electromagnetic pulses, with account taken of nonlinear effects. The dependences of the excitation probability of the 0→1 transition on duration and carrier frequency are studied for various amplitudes of the electric field of a Gaussian pulse. It is shown that for small values of the electric field, the dependences have a single maximum. Increasing of the electric field amplitude leads to a transition of this maximumto a minimum with simultaneous appearance of two new maxima.