Zollitsch, CW;
O'Sullivan, J;
Kennedy, O;
Dold, G;
Morton, JJL;
(2019)
Tuning high-Q superconducting resonators by magnetic field reorientation.
AIP Advances
, 9
(12)
, Article 125225. 10.1063/1.5129032.
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Abstract
ABSTRACT Superconducting resonators interfaced with paramagnetic spin ensembles are used to increase the sensitivity of electron spin resonance experiments and are key elements of microwave quantum memories. Certain spin systems that are promising for such quantum memories possess “sweet spots” at particular combinations of magnetic fields and frequencies, where spin coherence times or linewidths become particularly favorable. In order to be able to couple high-Q superconducting resonators to such specific spin transitions, it is necessary to be able to tune the resonator frequency under a constant magnetic field amplitude. Here, we demonstrate a high-quality, magnetic field resilient superconducting resonator, using a 3D vector magnet to continuously tune its resonance frequency by adjusting the orientation of the magnetic field. The resonator maintains a quality factor of >10^{5} up to magnetic fields of 2.6 T, applied predominantly in the plane of the superconductor. We achieve a continuous tuning of up to 30 MHz by rotating the magnetic field vector, introducing a component of 5 mT perpendicular to the superconductor.
| Type: | Article |
|---|---|
| Title: | Tuning high-Q superconducting resonators by magnetic field reorientation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.5129032 |
| Publisher version: | https://doi.org/10.1063/1.5129032 |
| Language: | English |
| Additional information: | © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10090366 |
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