Josephson microwave circuits are essential for the currently flourishing research on superconducting technologies, such as quantum computation, quantum sensing, and microwave signal processing. To increase the possible parameter space for device operation with respect to the current standards, many materials for superconducting circuits are under active investigation. Here, we present the realization of a frequency-tunable, weakly nonlinear Josephson microwave circuit made of the high-temperature cuprate superconductor YBa2Cu3O7 (YBCO), a material with a high critical temperature and a very high critical magnetic field. An in situ frequency-tunability of MHz is achieved by integrating a superconducting quantum interference device (SQUID) into the circuit based on Josephson junctions directly written with a helium ion microscope (HIM). Our results demonstrate that YBCO-HIM-SQUID microwave resonators are promising candidates for quantum sensing and microwave technology applications.
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A flux-tunable YBa2Cu3O7 quantum interference microwave circuit
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1 May 2023
Research Article|
May 01 2023
A flux-tunable YBa2Cu3O7 quantum interference microwave circuit
Special Collection:
2023 Rising Stars Collection
Kevin Uhl
;
Kevin Uhl
a)
(Conceptualization, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing)
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
, 72076 Tübingen, Germany
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Daniel Hackenbeck;
Daniel Hackenbeck
(Investigation, Methodology, Software, Writing – review & editing)
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
, 72076 Tübingen, Germany
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Christoph Füger;
Christoph Füger
(Investigation, Writing – review & editing)
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
, 72076 Tübingen, Germany
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Reinhold Kleiner
;
Reinhold Kleiner
(Funding acquisition, Supervision, Writing – review & editing)
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
, 72076 Tübingen, Germany
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Dieter Koelle
;
Dieter Koelle
(Funding acquisition, Supervision, Writing – review & editing)
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
, 72076 Tübingen, Germany
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Daniel Bothner
Daniel Bothner
a)
(Conceptualization, Formal analysis, Funding acquisition, Methodology, Supervision, Visualization, Writing – original draft, Writing – review & editing)
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
, 72076 Tübingen, Germany
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Appl. Phys. Lett. 122, 182603 (2023)
Article history
Received:
February 14 2023
Accepted:
March 27 2023
Citation
Kevin Uhl, Daniel Hackenbeck, Christoph Füger, Reinhold Kleiner, Dieter Koelle, Daniel Bothner; A flux-tunable YBa2Cu3O7 quantum interference microwave circuit. Appl. Phys. Lett. 1 May 2023; 122 (18): 182603. https://doi.org/10.1063/5.0146524
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