Tunable resonators for quantum circuits

Details Tunable resonators for quantum circuits Tunable resonators for quantum circuits

2007-12-03

arxiv.org/abs/0712.0221v1

Physics

Quantum Physics

subm. to JLTP (Proc. of LTD12 conference)

Scientific paper

10.1007/s10909-008-9774-x

We have designed, fabricated and measured high-Q $\lambda/2$ coplanar waveguide microwave resonators whose resonance frequency is made tunable with magnetic field by inserting a DC-SQUID array (including 1 or 7 SQUIDs) inside. Their tunability range is 30% of the zero field frequency. Their quality factor reaches up to 3$\times10^4$. We present a model based on thermal fluctuations that accounts for the dependance of the quality factor with magnetic field.

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