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Ultrasensitive inertial and force sensors with diamagnetically levitated magnets

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posted on 2023-06-09, 13:01 authored by Jordi Prat-Camps, C Teo, C C Rusconi, W Wieczorek, O Romero-Isart
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/vHz (for a 100-nm magnet) and 10-14??g/vHz (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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review Applied

ISSN

2331-7019

Publisher

American Physical Society

Issue

034002

Volume

8

Department affiliated with

  • Informatics Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-04-24

First Open Access (FOA) Date

2018-04-24

First Compliant Deposit (FCD) Date

2018-04-24

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