Optimal control for feedback cooling in cavityless levitated optomechanics
Optimal control for feedback cooling in cavityless levitated optomechanics
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.
Ferialdi, Luca
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Setter, Ashley
d368b8d0-849a-4ea2-a5a7-33a7b508bedb
Toroš, Marko
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Timberlake, Chris
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Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
3 July 2019
Ferialdi, Luca
fe7d1a2b-be44-4d3e-8723-8bc26986e9d3
Setter, Ashley
d368b8d0-849a-4ea2-a5a7-33a7b508bedb
Toroš, Marko
4f3aca77-9ce0-4bb4-8d13-b32480ccb823
Timberlake, Chris
4e5868c5-40c3-49e0-8a0e-f7e9f3a70bb6
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Ferialdi, Luca, Setter, Ashley, Toroš, Marko, Timberlake, Chris and Ulbricht, Hendrik
(2019)
Optimal control for feedback cooling in cavityless levitated optomechanics.
New Journal of Physics, 21, [073019].
(doi:10.1088/1367-2630/ab2b69/meta).
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.
Text
Ferialdi+et+al_2019_New_J._Phys._10.1088_1367-2630_ab2b69
- Accepted Manuscript
Text
Optimal control for feedback cooling in cavityless levitated optomechanics
- Other
More information
Accepted/In Press date: 20 June 2019
e-pub ahead of print date: 20 June 2019
Published date: 3 July 2019
Additional Information:
arXiv is AM
Identifiers
Local EPrints ID: 431948
URI: http://eprints.soton.ac.uk/id/eprint/431948
ISSN: 1367-2630
PURE UUID: 7c394792-d7e0-429a-8b82-7a4fbb9ea1b5
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Date deposited: 24 Jun 2019 16:30
Last modified: 16 Mar 2024 03:58
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Contributors
Author:
Luca Ferialdi
Author:
Ashley Setter
Author:
Marko Toroš
Author:
Chris Timberlake
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