Linear cooling of a levitated micromagnetic cylinder by vibration
Linear cooling of a levitated micromagnetic cylinder by vibration
We report feedback cooling of translational and librational degrees of freedom of a levitated m icromagnet cylinder, utilizing a piezoelectric actuator to apply linear feedback to high-Q mechanical modes. The normal modes are measured with a superconducting pick-up coil coupled to a dc SQUID, and phase information is fed back to the piezoelectric actuator to feedback cool a center-of-mass mode to ∼7K, and a librational mode to 830±200mK. Q-factors of 1.0×107 are evaluated for the center-of-mass mode. We find that it is plausible to achieve ground state cooling of the center-of-mass mode by introducing vibration isolation, optimizing the geometry of the pick-up coil to focus on the specific mode of interest and utilizing a state-of-the-art SQUID for detection.
Timberlake, Chris
0620cbe2-aff4-444a-b420-b6a48a8b85dd
Simcox, Elliot
2d82261b-b505-440b-a3d4-43f899f24800
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
30 September 2024
Timberlake, Chris
0620cbe2-aff4-444a-b420-b6a48a8b85dd
Simcox, Elliot
2d82261b-b505-440b-a3d4-43f899f24800
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Timberlake, Chris, Simcox, Elliot and Ulbricht, Hendrik
(2024)
Linear cooling of a levitated micromagnetic cylinder by vibration.
Physical Review Research, 6 (3), [033345].
Abstract
We report feedback cooling of translational and librational degrees of freedom of a levitated m icromagnet cylinder, utilizing a piezoelectric actuator to apply linear feedback to high-Q mechanical modes. The normal modes are measured with a superconducting pick-up coil coupled to a dc SQUID, and phase information is fed back to the piezoelectric actuator to feedback cool a center-of-mass mode to ∼7K, and a librational mode to 830±200mK. Q-factors of 1.0×107 are evaluated for the center-of-mass mode. We find that it is plausible to achieve ground state cooling of the center-of-mass mode by introducing vibration isolation, optimizing the geometry of the pick-up coil to focus on the specific mode of interest and utilizing a state-of-the-art SQUID for detection.
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LinearCoolingMicromagnet
- Accepted Manuscript
Text
PhysRevResearch.6.033345
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Accepted/In Press date: 22 August 2024
Published date: 30 September 2024
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Local EPrints ID: 496302
URI: http://eprints.soton.ac.uk/id/eprint/496302
ISSN: 2643-1564
PURE UUID: 666d1d3e-a24e-4583-9cf1-4f26a2494193
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Date deposited: 11 Dec 2024 17:38
Last modified: 12 Dec 2024 02:42
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Author:
Elliot Simcox
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