Granular Aluminum Parametric Amplifier for Low-Noise Measurements in Tesla Fields
Josephson junction parametric amplifiers have become essential tools for microwave quantum circuit readout with minimal added noise. Even after improving at an impressive rate in the past decade, they remain vulnerable to magnetic fields, which limits their use in many applications such as spin qubits, Andreev and molecular magnet devices, dark matter searches, etc. Kinetic inductance materials, such as granular aluminum (grAl), offer an alternative source of nonlinearity with innate magnetic field resilience. We present a nondegenerate amplifier made of two coupled grAl resonators resilient to in-plane magnetic fields up to 1T. It offers 20 dB of gain close to the quantum limit of added noise, with a gain-bandwidth product of 28 MHz and -110 dBm input saturation power.
Authors
- Ameya Nambisan (ORCID: https://orcid.org/0000-0001-9040-2051)
- Simon Geisert
- M. E. Field
- Simon Günzler (ORCID: https://orcid.org/0000-0001-7873-8644)
- Ivan Takmakov (ORCID: https://orcid.org/0000-0002-9210-1241)
- Thomas Reisinger (ORCID: https://orcid.org/0000-0001-7982-9935)
- Wolfgang Wernsdorfer (ORCID: https://orcid.org/0000-0003-4602-5257)
- D. J. Rieger (ORCID: https://orcid.org/0000-0001-6626-3901)
- Ioan M. Pop (ORCID: https://orcid.org/0000-0002-6776-9792)
- Soeren Ihssen
- Nicolas Zapata (ORCID: https://orcid.org/0009-0005-0132-030X)
Institutions
- Karlsruhe Institute of Technology (DE)
- Informatica Qatar (Qatar) (QA)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-12-27
- DOI
- https://doi.org/10.1103/physrevlett.133.260604
- Citations
- 8
- Primary Topic
- Atomic and Subatomic Physics Research
- Type
- article
- Field-Weighted Citation Impact
- 2.70
Funders
- Baden-Württemberg Stiftung
- Karlsruhe Institute of Technology
- Deutsche Forschungsgemeinschaft
- Bundesministerium für Bildung und Forschung
- HORIZON EUROPE Framework Programme
- Leibniz-Rechenzentrum
- H2020 Future and Emerging Technologies