Optimal control for feedback cooling in cavityless levitated optomechanics
Quantum Physics
2019-07-08 v2 Mesoscale and Nanoscale Physics
Optics
Abstract
We consider feedback cooling in a cavityless levitated optomechanics setup, and we investigate the possibility to improve the feedback implementation. We apply optimal control theory to derive the optimal feedback signal both for quadratic (parametric) and linear (electric) feedback. We numerically compare optimal feedback against the typical feedback implementation used for experiments. In order to do so, we implement a tracking scheme that takes into account the modulation of the laser intensity. We show that such a tracking implementation allows us to increase the feedback strength, leading to faster cooling rates and lower center-of-mass temperatures.
Cite
@article{arxiv.1904.05274,
title = {Optimal control for feedback cooling in cavityless levitated optomechanics},
author = {Luca Ferialdi and Ashley Setter and Marko Toroš and Chris Timberlake and Hendrik Ulbricht},
journal= {arXiv preprint arXiv:1904.05274},
year = {2019}
}
Comments
18 pages, 9 figures