Strongly Shaken Fermi Gas

We study the dynamics of the non- and weakly interacting Fermi gases in response to an oscillating gradient potential with tunable frequency and strength. At low drive strengths, we find our measurement of the density-density response function is in good agreement with the linear response theory. However, as the drive strength increases, we observe the saturation and decrease of the imaginary part of the response function, while the real part remains unchanged. Additionally, our examination of the system's energy dynamics reveals a diffusive behavior, where the energy increases linearly in time, albeit at a slower rate compared to the predictions of linear response theory. We further explore the suppression of energy absorption with respect to driving frequency, driving strength, and the interparticle interactions.