Thin-film superconducting resonator tunable to the ground-state hyperfine splitting of 87Rb

Z. Kim; C. P. Vlahacos; J. E. Hoffman; J. A. Grover; K. D. Voigt; B. K. Cooper; C. J. Ballard; B. S. Palmer; M. Hafezi; J. M. Taylor; J. R. Anderson; A. J. Dragt; C. J. Lobb; L. A. Orozco; S. L. Rolston; F. C. Wellstood

doi:10.1063/1.3651466

AIP Advances (Dec 2011)

Thin-film superconducting resonator tunable to the ground-state hyperfine splitting of 87Rb

Z. Kim,
C. P. Vlahacos,
J. E. Hoffman,
J. A. Grover,
K. D. Voigt,
B. K. Cooper,
C. J. Ballard,
B. S. Palmer,
M. Hafezi,
J. M. Taylor,
J. R. Anderson,
A. J. Dragt,
C. J. Lobb,
L. A. Orozco,
S. L. Rolston,
F. C. Wellstood

Affiliations

Z. Kim: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
C. P. Vlahacos: Center for Nanophysics and Advanced Materials, College Park, Maryland 20742, USA
J. E. Hoffman: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
J. A. Grover: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
K. D. Voigt: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
B. K. Cooper: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
C. J. Ballard: Trevecca Nazarene College, Nashville, Tennessee 37210, USA
B. S. Palmer: Laboratory for Physical Sciences, College Park, Maryland 20740, USA
M. Hafezi: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
J. M. Taylor: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
J. R. Anderson: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
A. J. Dragt: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
C. J. Lobb: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
L. A. Orozco: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
S. L. Rolston: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
F. C. Wellstood: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA

DOI: https://doi.org/10.1063/1.3651466
Journal volume & issue: Vol. 1, no. 4
pp. 042107 – 042107-6

Abstract

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We describe a thin-film superconducting Nb microwave resonator, tunable to within 0.3 ppm of the hyperfine splitting of 87Rb at fRb = 6.834683 GHz. We coarsely tuned the resonator using electron-beam lithography, decreasing the resonance frequency from 6.8637 GHz to 6.8278 GHz. For in situ fine tuning at 15 mK, the resonator inductance was varied using a piezoelectric stage to move a superconducting pin above the resonator. We found a maximum frequency shift of about 8.7 kHz per 60-nm piezoelectric step and a tuning range of 18 MHz.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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