Planar Superconducting Whispering Gallery Mode Resonators

Abstract

We introduce a microwave circuit architecture for quantum signal processing combining design principles borrowed from high-Q 3D resonators in the quantum regime and from planar structures fabricated with standard lithography. The resulting '2.5D' whispering-gallery mode resonators store 98% of their energy in vacuum. We have measured internal quality factors above 3 million at the single photon level and have used the device as a materials characterization platform to place an upper bound on the surface resistance of thin film aluminum of less than 250nOhms.

3 Pages, 3 Figures

References in corpus (4)

• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Photon Shot Noise Dephasing in the Strong-Dispersive Limit of Circuit QED
• Minimal resonator loss for circuit quantum electrodynamics
• Improving the Quality Factor of Microwave Compact Resonators by Optimizing their Geometrical Parameters

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