Tunable backaction of a dc SQUID on an integrated micromechanical resonator

We have measured the backaction of a dc superconducting quantum interference device (SQUID) position detector on an integrated 1 MHz flexural resonator. The frequency and quality factor of the micromechanical resonator can be tuned with bias current and applied magnetic flux. The backaction is cause...

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Bibliographic Details
Published in:arXiv.org 2010-09
Main Authors: Poot, M, Etaki, S, Mahboob, I, Onomitsu, K, Yamaguchi, H, Blanter, Ya M, H S J van der Zant
Format: Article
Language:English
Subjects:
Lorentz force
Magnetic flux
Mathematical models
Q factors
Resonators
Superconducting quantum interference devices
Superconductors
Online Access:Get full text
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Summary:We have measured the backaction of a dc superconducting quantum interference device (SQUID) position detector on an integrated 1 MHz flexural resonator. The frequency and quality factor of the micromechanical resonator can be tuned with bias current and applied magnetic flux. The backaction is caused by the Lorentz force due to the change in circulating current when the resonator displaces. The experimental features are reproduced by numerical calculations using the resistively and capacitively shunted junction (RCSJ) model.
ISSN:2331-8422
DOI:10.48550/arxiv.1009.4115