2013/10/09 by Zijun Chen, Anthony Megrant, Julian Kelly +16 · 2 citations
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1063/1.4863745
8 pages and 7 figures including supplementary information
arxiv created 2013/10/09 · arxiv updated 2015/06/17
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.