Power-dependence measurement of the quality factor of superconducting microwave resonators at mK temperature

Kim, S.H.; Ha, D.-G.; Park, G.Y.; Choi, J.; Park, J.H.; Song, W.; Lee, S.G.; Im, H.; Kim, H.; Chong, Y.

doi:10.1109/CPEM.2014.6898315

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Power-dependence measurement of the quality factor of superconducting microwave resonators at mK temperature

Kim, S.H.;
Ha, D.-G.;
Park, G.Y.;
Choi, J.;
Park, J.H.;
외 5명

Citations

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초록

We report our setup and measurement results of the quality factor Q of superconducting microwave resonators at mK temperature in a dilution refrigerator. The power dependence of the superconducting resonators' Q was measured down to the single photon level. Measurements were performed on two types of microwave resonators. First, a half-wavelength coplanar waveguide (CPW) resonator made of niobium film on an oxidized high-resistivity silicon substrate was measured. Then a rectangular box resonator made of machined superconducting aluminum alloy was measured. While the CPW chip resonator's Q value showed noticeable decrease at low microwave power, the box resonator's Q showed little power dependence. This setup is intended to perform characterization of various microwave resonators, which will serve as key components in superconducting qubit in circuit QED architecture. © 2014 IEEE.

키워드

dilution refrigerator; microwave resonator; power dependence; quality factor; superconducting qubit; two-level state

제목: Power-dependence measurement of the quality factor of superconducting microwave resonators at mK temperature

저자: Kim, S.H.; Ha, D.-G.; Park, G.Y.; Choi, J.; Park, J.H.; Song, W.; Lee, S.G.; Im, H.; Kim, H.; Chong, Y.

DOI: 10.1109/CPEM.2014.6898315

발행일: 2014-09-12

유형: Conference Paper

저널명: CPEM Digest (Conference on Precision Electromagnetic Measurements)

페이지: 174 ~ 175