Performance and limits of feedback cooling methods for levitated oscillators: A direct comparison

Cooling the center-of-mass motion is an important tool for levitated optomechanical systems, but it often not clear which method can practically reach lower temperatures a particular experiment. We directly compare parametric and velocity feedback damping methods, are used extensively cooling of single trapped particles in range traps. By performing experiments on same particle, with detection system, we demonstrate that cools oscillator to temperature order magnitude more resilient imperfect experimental conditions. show these results consistent analytical limits as well numerical simulations include noise.