Ferialdi, L., Setter, A., Toroš, M. , Timberlake, C. and Ulbricht, H. (2019) Optimal control for feedback cooling in cavityless levitated optomechanics. New Journal of Physics, 21(7), 073019. (doi: 10.1088/1367-2630/ab2b69)
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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 state estimation scheme that takes into account the modulation of the laser intensity. We show that such an implementation allows us to increase the feedback strength, leading to faster cooling rates and lower center-of-mass temperatures.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Toros, Dr Marko |
Authors: | Ferialdi, L., Setter, A., Toroš, M., Timberlake, C., and Ulbricht, H. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | New Journal of Physics |
Publisher: | IOP Publishing |
ISSN: | 1367-2630 |
ISSN (Online): | 1367-2630 |
Published Online: | 03 July 2019 |
Copyright Holders: | Copyright © 2019 The Authors |
First Published: | First published in New Journal of Physics 21(7): 073019 |
Publisher Policy: | Reproduced under a Creative Commons License |
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