Remote sensing of a levitated superconductor with a flux-tunable microwave cavity
Schmidt P, Claessen R, Higgins G, Hofer J, Hansen JJ, Asenbaum P, Zemlicka M, Uhl K, Kleiner R, Gross R, Huebl H, Trupke M, Aspelmeyer M. 2024. Remote sensing of a levitated superconductor with a flux-tunable microwave cavity. Physical Review Applied. 22, 014078.
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Author
Schmidt, Philip;
Claessen, Remi;
Higgins, Gerard;
Hofer, Joachim;
Hansen, Jannek J.;
Asenbaum, Peter;
Zemlicka, MartinISTA;
Uhl, Kevin;
Kleiner, Reinhold;
Gross, Rudolf;
Huebl, Hans;
Trupke, Michael
All
All
Department
Abstract
We present a cavity-electromechanical system comprising a superconducting quantum interference device which is embedded in a microwave resonator and coupled via a pickup loop to a 6-μg magnetically levitated superconducting sphere. The motion of the sphere in the magnetic trap induces a frequency shift in the SQUID-cavity system. We use microwave spectroscopy to characterize the system, and we demonstrate that the electromechanical interaction is tunable. The measured displacement sensitivity of 10−7m/√Hz defines a path towards ground-state cooling of levitated particles with Planck-scale masses at millikelvin environment temperatures.
Publishing Year
Date Published
2024-07-30
Journal Title
Physical Review Applied
Publisher
American Physical Society
Acknowledgement
We gratefully acknowledge valuable discussions with Uros Delic, Lorenzo Magrini, and Corentin Gut. This work was supported by the European Union’s Horizon 2020 research and innovation program under Grant No. 863132 (iQLev) and No. 101080143 (SuperMeQ), the European Research Council under Grant No. 951234 (ERC Synergy QXtreme), the Austrian and Bavarian Academy of Sciences (Topical Team SGQ), the Alexander von Humboldt Foundation through a Feodor Lynen Fellowship (P.S.), the Swedish Research Council under Grant No. 2020-00381 (G.H.), and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via Germany’s Excellence Strategy EXC-2111-390814868 (H.H., R.G.).
Volume
22
Article Number
014078
eISSN
IST-REx-ID
Cite this
Schmidt P, Claessen R, Higgins G, et al. Remote sensing of a levitated superconductor with a flux-tunable microwave cavity. Physical Review Applied. 2024;22. doi:10.1103/PhysRevApplied.22.014078
Schmidt, P., Claessen, R., Higgins, G., Hofer, J., Hansen, J. J., Asenbaum, P., … Aspelmeyer, M. (2024). Remote sensing of a levitated superconductor with a flux-tunable microwave cavity. Physical Review Applied. American Physical Society. https://doi.org/10.1103/PhysRevApplied.22.014078
Schmidt, Philip, Remi Claessen, Gerard Higgins, Joachim Hofer, Jannek J. Hansen, Peter Asenbaum, Martin Zemlicka, et al. “Remote Sensing of a Levitated Superconductor with a Flux-Tunable Microwave Cavity.” Physical Review Applied. American Physical Society, 2024. https://doi.org/10.1103/PhysRevApplied.22.014078.
P. Schmidt et al., “Remote sensing of a levitated superconductor with a flux-tunable microwave cavity,” Physical Review Applied, vol. 22. American Physical Society, 2024.
Schmidt P, Claessen R, Higgins G, Hofer J, Hansen JJ, Asenbaum P, Zemlicka M, Uhl K, Kleiner R, Gross R, Huebl H, Trupke M, Aspelmeyer M. 2024. Remote sensing of a levitated superconductor with a flux-tunable microwave cavity. Physical Review Applied. 22, 014078.
Schmidt, Philip, et al. “Remote Sensing of a Levitated Superconductor with a Flux-Tunable Microwave Cavity.” Physical Review Applied, vol. 22, 014078, American Physical Society, 2024, doi:10.1103/PhysRevApplied.22.014078.
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