Tunable Superconducting Cavity using Superconducting Quantum Interference Device Metamaterials
| Autor: | J. W. Alldredge, Kyle McElroy, Andrew C. Strikwerda, Samuel Kim, David Shrekenhamer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Superconductivity Physics Coupling Multidisciplinary business.industry lcsh:R Metamaterial Physics::Optics lcsh:Medicine Plasma oscillation Magnetic flux Article 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Quality (physics) Superconducting cavity Qubit Optoelectronics Physics::Accelerator Physics lcsh:Q business lcsh:Science 030217 neurology & neurosurgery |
| Zdroj: | Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Here we consider a tunable superconducting cavity that can be used either as a tunable coupler to a qubit inside the cavity or as a tunable low noise, low temperature, RF filter. Our design consists of an array of radio-frequency superconducting quantum interference devices (rf SQUIDs) inside a superconducting cavity. This forms a tunable metamaterial structure which couples to the cavity through its magnetic plasma frequency. By tuning the resonant frequency of the metamaterial through an applied magnetic flux, one can tune the cavity mode profile. This allows us to detune the cavity initially centered at 5.593 GHz by over 200 MHz. The maximum quality factor approaches that of the empty cavity, which is 4.5 × 106. The metamaterial electromagnetic response is controlled via a low-frequency or dc magnetic flux bias, and we present a control line architecture that is capable of applying sufficient magnetic flux bias with minimal parasitic coupling. Together this design allows for an in-situ tunable cavity which enables low-temperature quantum control applications. |
| Databáze: | OpenAIRE |
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