We present a parametric driving method to cool an ultracold Fermi gas in a crossed-beam optical dipole trap. This method selectively removes high-energy atoms from the trap by periodically modulating the trap depth with frequencies that are resonant with the anharmonic components of the trapping potential.
Li, J., de Melo, L. F., Luo, L. Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving. J. Vis. Exp. (121), e55409, doi:10.3791/55409 (2017).