Overlap junctions for superconducting quantum electronics and amplifiers
- NIST, Boulder; Colorado U.
- NIST, Boulder; STUK, Helsinki
- STUK, Helsinki
- Fermilab
- Wisconsin U., Madison
- NIST, Boulder
Due to their unique properties as lossless, nonlinear circuit elements, Josephson junctions lie at the heart of superconducting quantum information processing. Previously, we demonstrated a two-layer, submicrometer-scale overlap junction fabrication process suitable for qubits with long coherence times. Here, we extend the overlap junction fabrication process to micrometer-scale junctions. This allows us to fabricate other superconducting quantum devices. For example, we demonstrate an overlap junction-based Josephson parametric amplifier that uses only two layers. This efficient fabrication process yields frequency-tunable devices with negligible insertion loss, a gain of ~ 30 dB, and quantum limited noise performance. Compared to other processes, the overlap junction allows for fabrication with minimal infrastructure, high yield, and state-of-the-art device performance.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1833295
- Report Number(s):
- FERMILAB-PUB-21-600-SQMS-TD; arXiv:2005.10908; oai:inspirehep.net:1860914
- Journal Information:
- Appl.Phys.Lett., Vol. 118, Issue 11
- Country of Publication:
- United States
- Language:
- English
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