Ferialdi, L;
Setter, A;
Toros, M;
Timberlake, C;
Ulbricht, H;
(2019)
Optimal control for feedback cooling in cavityless levitated optomechanics.
New Journal of Physics
, 21
, Article 073019. 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.
| Type: | Article |
|---|---|
| Title: | Optimal control for feedback cooling in cavityless levitated optomechanics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1367-2630/ab2b69 |
| Publisher version: | https://doi.org/10.1088/1367-2630/ab2b69 |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. https://creativecommons.org/licenses/by/3.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10079903 |
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