Feedback cooling a levitated nanoparticle's libration to below 100 phonons
Macroscopic rotors are interesting model systems to test quantum theory and for quantum sensing. A promising approach for bringing these systems to the quantum regime is to combine sensitive detection with feedback cooling to reduce the thermal occupation of the mechanics. Here, we implement a backward-scattering scheme to efficiently detect all three libration modes of an optically levitated nanoparticle. We demonstrate parametric feedback cooling of all three libration degrees of freedom to below 16~mK, with one of the modes reaching the temperature of 1.3~mK, corresponding to a mean phonon number of 84. Finally, we characterize the backward-scattering scheme by determining its measurement efficiency to be 0.5\%..
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Preprint| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
arXiv.org - (2024) vom: 29. Feb. Zur Gesamtaufnahme - year:2024 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
Gao, Jialiang [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| PPN (Katalog-ID): |
XCH042738946 |
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| 100 | 1 | |a Gao, Jialiang |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Feedback cooling a levitated nanoparticle's libration to below 100 phonons |
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| 520 | |a Macroscopic rotors are interesting model systems to test quantum theory and for quantum sensing. A promising approach for bringing these systems to the quantum regime is to combine sensitive detection with feedback cooling to reduce the thermal occupation of the mechanics. Here, we implement a backward-scattering scheme to efficiently detect all three libration modes of an optically levitated nanoparticle. We demonstrate parametric feedback cooling of all three libration degrees of freedom to below 16~mK, with one of the modes reaching the temperature of 1.3~mK, corresponding to a mean phonon number of 84. Finally, we characterize the backward-scattering scheme by determining its measurement efficiency to be 0.5\%. | ||
| 650 | 4 | |a Quantum Physics |7 (dpeaa)DE-84 | |
| 650 | 4 | |a 530 |7 (dpeaa)DE-84 | |
| 700 | 1 | |a van der Laan, Fons |4 aut | |
| 700 | 1 | |a Zielinska, Joanna A. |4 aut | |
| 700 | 1 | |a Militaru, Andrei |4 aut | |
| 700 | 1 | |a Novotny, Lukas |4 aut | |
| 700 | 1 | |a Frimmer, Martin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t arXiv.org |g (2024) vom: 29. Feb. |
| 773 | 1 | 8 | |g year:2024 |g day:29 |g month:02 |
| 856 | 4 | 0 | |u https://arxiv.org/abs/2402.19245 |z kostenfrei |3 Volltext |
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