Characterizing the attenuation of coaxial and rectangular microwave-frequency waveguides at cryogenic temperatures
Open access
Date
2017-05-04Type
- Journal Article
ETH Bibliography
yes
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Abstract
Low-loss waveguides are required for quantum communication at distances beyond the chip-scale for any low-temperature solid-state implementation of quantum information processors. We measure and analyze the attenuation constant of commercially available microwave-frequency waveguides down to millikelvin temperatures and single photon levels. More specifically, we characterize the frequency-dependent loss of a range of coaxial and rectangular microwave waveguides down to 0.005 dB/m using a resonant-cavity technique. We study the loss tangent and relative permittivity of commonly used dielectric waveguide materials by measurements of the internal quality factors and their comparison with established loss models. The results of our characterization are relevant for accurately predicting the signal levels at the input of cryogenic devices, for reducing the loss in any detection chain, and for estimating the heat load induced by signal dissipation in cryogenic systems. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000196769Publication status
publishedExternal links
Journal / series
EPJ Quantum TechnologyVolume
Pages / Article No.
Publisher
SpringerSubject
Cryogenic temperature; Rectangular waveguide; Coaxial cable; Coaxial line; Center conductorOrganisational unit
03720 - Wallraff, Andreas / Wallraff, Andreas
03864 - Kirch, Klaus / Kirch, Klaus
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ETH Bibliography
yes
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