Remote sensing of a levitated superconductor with a flux-tunable microwave cavity
Journal article, 2024
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.
Author
P. Schmidt
Osterreichische Akademie Der Wissenschaften
Remi Claessen
University of Vienna
Gerard Higgins
Osterreichische Akademie Der Wissenschaften
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
J. Hofer
University of Vienna
Osterreichische Akademie Der Wissenschaften
Jannek J. Hansen
University of Vienna
Peter Asenbaum
Osterreichische Akademie Der Wissenschaften
Martin Zemlicka
Institute of Science and Technology Austria
K. Uhl
Center for Quantum Science (CQ) and LISA+
R. Kleiner
Center for Quantum Science (CQ) and LISA+
R. Gross
MCQST
Walther-Meissner-Institute for Low Temperature Research
Technical University of Munich
H. Huebl
Walther-Meissner-Institute for Low Temperature Research
MCQST
Technical University of Munich
M. Trupke
Osterreichische Akademie Der Wissenschaften
M. Aspelmeyer
University of Vienna
Osterreichische Akademie Der Wissenschaften
Physical Review Applied
2331-7019 (eISSN)
Vol. 22 1 014078Testing quantum physics in uncharted territory using a magneto-mechanical oscillator
Swedish Research Council (VR) (2020-00381), 2020-07-01 -- 2023-06-30.
Exploring nonclassical states of center-of-mass mechanical motion with superconducting magneto- and levitomechanics
European Commission (EC) (EC/HE/101080143), 2022-10-01 -- 2026-09-30.
Subject Categories
Atom and Molecular Physics and Optics
Condensed Matter Physics
DOI
10.1103/PhysRevApplied.22.014078