Fig. 1: Excitation schemes.
From: Perspective: an X-ray view of the coherent driving of materials
Classical view of the coherent excitation of an oscillator in different mathematical limits in the absence of damping, showing the time domain effective force (top row), the corresponding Fourier transform of the force (middle row) and the classical response of the expectation value of the oscillator coordinate \(\left\langle y\right\rangle\). The columns show the different limiting cases: (a) impulsive excitation, where the effective force on the oscillator exists for only a short time in comparison to the natural period of the oscillator, (b) displacive excitation, where the effective force follows a step-like behavior, and (c) resonant excitation, where the excitation frequency is set to match the natural frequency of the oscillator (vertical dashed lines).
