title: Tunable backaction of a DC SQUID on an integrated micromechanical resonator.
abstract: 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 model.
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands. menno.poot@yale.edu
authors.forename: M
authors.initials: M
authors.lastname: Poot
authors.forename: S
authors.initials: S
authors.lastname: Etaki
authors.forename: I
authors.initials: I
authors.lastname: Mahboob
authors.forename: K
authors.initials: K
authors.lastname: Onomitsu
authors.forename: H
authors.initials: H
authors.lastname: Yamaguchi
authors.forename: Ya M
authors.initials: YM
authors.lastname: Blanter
authors.forename: H S J
authors.initials: HS
authors.lastname: van der Zant