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High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures
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- Hofer, J. (author)
- Universität Wien,University of Vienna,Osterreichische Akademie Der Wissenschaften
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- Gross, R. (author)
- Munich Center for Quantum Science and Technology (MCQST),Technische Universität München (TUM),Technical University of Munich (TUM)
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- Higgins, Gerard, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Osterreichische Akademie Der Wissenschaften
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- (creator_code:org_t)
- 2023
- 2023
- English.
- In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 131:4
- Journal article (peer-reviewed)
Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- ref (subject category)
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- Hofer, J.
- Gross, R.
- Higgins, Gerard, ...
- Huebl, H.
- Kieler, O. F.
- Kleiner, R.
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- Koelle, D.
- Schmidt, P.
- Slater, J. A.
- Trupke, M.
- Uhl, K.
- Weimann, T.
- Wieczorek, Witle ...
- Aspelmeyer, M.
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