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.
Författare
J. Hofer
Universität Wien
Osterreichische Akademie Der Wissenschaften
R. Gross
MCQST
Walther-Meissner-Institut für Tieftemperaturforschung
Technische Universität München
Gerard Higgins
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Osterreichische Akademie Der Wissenschaften
H. Huebl
MCQST
Walther-Meissner-Institut für Tieftemperaturforschung
Technische Universität München
O. F. Kieler
Physikalisch-Technische Bundesanstalt (PTB)
R. Kleiner
Universität Tübingen
D. Koelle
Universität Tübingen
P. Schmidt
Osterreichische Akademie Der Wissenschaften
J. A. Slater
Universität Wien
M. Trupke
Universität Wien
K. Uhl
Universität Tübingen
T. Weimann
Physikalisch-Technische Bundesanstalt (PTB)
Witlef Wieczorek
Universität Wien
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
M. Aspelmeyer
Universität Wien
Osterreichische Akademie Der Wissenschaften
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 131 4 043603Att 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.
Ämneskategorier
Den kondenserade materiens fysik
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