Performance and limits of feedback cooling methods for levitated oscillators: A direct comparison
Year: 2021
Authors: Penny T.W., Pontin A., Barker P.F.
Autors Affiliation: UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England.
Abstract: Cooling the center-of-mass motion is an important tool for levitated optomechanical systems, but it is often not clear which method can practically reach lower temperatures for a particular experiment. We directly compare the parametric and velocity feedback damping methods, which are used extensively for cooling the motion of single trapped particles in a range of traps. By performing experiments on the same particle, and with the same detection system, we demonstrate that velocity damping cools the oscillator to a temperature an order of magnitude lower and is more resilient to imperfect experimental conditions. We show that these results are consistent with analytical limits as well as numerical simulations that include experimental noise.
Journal/Review: PHYSICAL REVIEW A
Volume: 104 (2) Pages from: 23502-1 to: 23502-13
More Information: The authors acknowledge funding from the EPSRC Grant No. EP/N031105/1 and the H2020-EU.1.2.1 TEQ project Grant agreement ID: 766900. A.P. has received funding from the European Union’s Horizon 2020 research and innovation program under theMarie Sklodowska-Curie Grant Agreement ID: 749709.KeyWords: Quantum Control; Dynamics; Noise; NanoparticleDOI: 10.1103/PhysRevA.104.023502