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

journal article·2011-12-01Open access

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

AIP Advances· Volume 1· Issue 4

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Source abstract

Abstract

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.

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Research context

OpenAlex topics: Physics of Superconductivity and Magnetism · Advanced Frequency and Time Standards · Cold Atom Physics and Bose-Einstein Condensates

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Affiliations

University of Maryland 1 Joint Quantum Institute and Department of Physics, , College Park, Maryland 20742, USA

Center for Nanophysics and Advanced Materials 2 , College Park, Maryland 20742, USA

Trevecca Nazarene College 3 , Nashville, Tennessee 37210, USA

Laboratory for Physical Sciences 4 , College Park, Maryland 20740, USA

National Institute of Standards and Technology 5 , Gaithersburg, Maryland 20899, USA

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