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Ultrasensitive Inertial and Force Sensors with Diamagnetically Levitated Magnets

Autor(en)
J. Prat-Camps, C. Teo, C. C. Rusconi, W. Wieczorek, O. Romero-Isart
Abstrakt

We theoretically show that a magnet can be stably levitated on top of a punctured superconductor sheet in the Meissner state without applying any external field. The trapping potential created by such induced-only superconducting currents is characterized for magnetic spheres ranging from tens of nanometers to tens of millimeters. Such a diamagnetically levitated magnet is predicted to be extremely well isolated from the environment. We propose to use it as an ultrasensitive force and inertial sensor. A magnetomechanical readout of its displacement can be performed by using superconducting quantum interference devices. An analysis using current technology shows that force and acceleration sensitivities on the order of 10-23 N/Hz (for a 100-nm magnet) and 10-14 g/Hz (for a 10-mm magnet) might be within reach in a cryogenic environment. Such remarkable sensitivities, both in force and acceleration, can be used for a variety of purposes, from designing ultrasensitive inertial sensors for technological applications (e.g., gravimetry, avionics, and space industry), to scientific investigations on measuring Casimir forces of magnetic origin and gravitational physics.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Österreichische Akademie der Wissenschaften (ÖAW), National University of Singapore (NUS), Chalmers University of Technology, Leopold-Franzens-Universität Innsbruck, Vienna Center for Quantum Science and Technology (VCQ)
Journal
Physical Review Applied
Band
8
Anzahl der Seiten
10
ISSN
2331-7019
DOI
https://doi.org/10.1103/PhysRevApplied.8.034002
Publikationsdatum
09-2017
Peer-reviewed
Ja
ÖFOS 2012
103025 Quantenmechanik, 103033 Supraleitung
Schlagwörter
ASJC Scopus Sachgebiete
Allgemeine Physik und Astronomie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/b48f0c34-5a5f-4681-9a04-b3a6cade2f2b