High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures

J. Hofer; R. Gross; G. Higgins; H. Huebl; O. F. Kieler; R. Kleiner; D. Koelle; P. Schmidt; J. A. Slater; M. Trupke; K. Uhl; T. Weimann; W. Wieczorek; M. Aspelmeyer

doi:10.1103/PhysRevLett.131.043603

High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures

J. Hofer, R. Gross, G. Higgins, H. Huebl, O. F. Kieler, R. Kleiner, D. Koelle, P. Schmidt, J. A. Slater, M. Trupke, K. Uhl, T. Weimann, W. Wieczorek, M. Aspelmeyer

Chair of Technical Physics

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18 Scopus citations

Abstract

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.

Original language	English
Article number	043603
Journal	Physical Review Letters
Volume	131
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.131.043603
State	Published - 28 Jul 2023

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Hofer, J., Gross, R., Higgins, G., Huebl, H., Kieler, O. F., Kleiner, R., Koelle, D., Schmidt, P., Slater, J. A., Trupke, M., Uhl, K., Weimann, T., Wieczorek, W., & Aspelmeyer, M. (2023). High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures. Physical Review Letters, 131(4), Article 043603. https://doi.org/10.1103/PhysRevLett.131.043603

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title = "High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures",

abstract = "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.",

author = "J. Hofer and R. Gross and G. Higgins and H. Huebl and Kieler, {O. F.} and R. Kleiner and D. Koelle and P. Schmidt and Slater, {J. A.} and M. Trupke and K. Uhl and T. Weimann and W. Wieczorek and M. Aspelmeyer",

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doi = "10.1103/PhysRevLett.131.043603",

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AU - Hofer, J.

AU - Gross, R.

AU - Higgins, G.

AU - Huebl, H.

AU - Kieler, O. F.

AU - Kleiner, R.

AU - Koelle, D.

AU - Schmidt, P.

AU - Slater, J. A.

AU - Trupke, M.

AU - Uhl, K.

AU - Weimann, T.

AU - Wieczorek, W.

AU - Aspelmeyer, M.

PY - 2023/7/28

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N2 - 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.

AB - 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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SN - 0031-9007

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

M1 - 043603

ER -

High- Q Magnetic Levitation and Control of Superconducting Microspheres at Millikelvin Temperatures

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