High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures
Artikel i vetenskaplig tidskrift, 2023

We report the levitation of a superconducting lead-tin sphere with 100 μm diameter (corresponding to a mass of 5.6 μg) in a static magnetic trap formed by two coils in an anti-Helmholtz configuration, with adjustable resonance frequencies up to 240 Hz. The center-of-mass motion of the sphere is monitored magnetically using a dc superconducting quantum interference device as well as optically and exhibits quality factors of up to 2.6×107. We also demonstrate 3D magnetic feedback control of the motion of the sphere. The setup is housed in a dilution refrigerator operating at 15 mK. By implementing a cryogenic vibration isolation system, we can attenuate environmental vibrations at 200 Hz by approximately 7 orders of magnitude. The combination of low temperature, large mass, and high quality factor provides a promising platform for testing quantum physics in previously unexplored regimes with high mass and long coherence times.
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Publicerad i

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 131 Nummer/häfte 4 art. nr 043603

Forskningsprojekt

Att testa kvantfysik på outforskat territorium med hjälp av en magneto-mekanisk oscillator

Vetenskapsrådet (VR) (2020-00381), 2020-07-01 -- 2023-06-30.

Exploring nonclassical states of center-of-mass mechanical motion with superconducting magneto- and levitomechanics

Europeiska kommissionen (EU) (EC/HE/101080143), 2022-10-01 -- 2026-09-30.

Kategorisering

Ämneskategorier (SSIF 2011)

Den kondenserade materiens fysik

Identifikatorer

DOI

10.1103/PhysRevLett.131.043603

PubMed

37566828

Relaterade dataset

Data used in the article "High-Q magnetic levitation and control of superconducting microspheres at millikelvin temperatures" [dataset]

DOI: 10.5281/zenodo.7837943

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Senast uppdaterat

2023-09-22