Fabrication and characterization of aluminum airbridges for superconducting microwave circuits

Journal Article · Mon Feb 03 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4863745· OSTI ID:22283279

Chen, Zijun; Kelly, J.; Barends, R.; Bochmann, J.; Chen, Yu; Chiaro, B.; Dunsworth, A.; Jeffrey, E.; Mutus, J. Y.; O'Malley, P. J. J.; Neill, C.; Roushan, P.; Sank, D.; Vainsencher, A.; Wenner, J.; White, T. C. ^[1]; Megrant, A. ^[1]; Cleland, A. N.

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1. Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States)

Superconducting microwave circuits based on coplanar waveguides (CPW) are susceptible to parasitic slotline modes which can lead to loss and decoherence. We motivate the use of superconducting airbridges as a reliable method for preventing the propagation of these modes. We describe the fabrication of these airbridges on superconducting resonators, which we use to measure the loss due to placing airbridges over CPW lines. We find that the additional loss at single photon levels is small, and decreases at higher drive powers.

• OSTI ID: 22283279
• Journal Information: Applied Physics Letters, Vol. 104, Issue 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
FABRICATION
MICROWAVE RADIATION
PHOTONS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
WAVEGUIDES