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Superconducting Qubits
Hybrid superinductance with Al/InAs
arXiv
Authors: Junseok Oh, Ido Levy, Tyler Cowan, Jacob Issokson, Archana Kamal, Javad Shabani, Andrew P. Higginbotham
Year
2026
Paper ID
3797
Status
Preprint
Abstract Read
~2 min
Abstract Words
79
Citations
N/A
Abstract
We report microwave spectroscopy of Josephson junctions chains made from an epitaxial Al/InAs heterostructure. The chains exhibit superinductance, with characteristic wave impedance exceeding RQ = hbar/(2e)2. The planar nature of the junctions results in a large plasma frequency, with no measurable deviations from ideal dispersion up to 12 GHz. Internal quality factors decrease sharply with frequency, which we describe with a simple loss model. The possibility of a loss mechanism intrinsic to the superconductor-semiconductor junction is considered.
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- This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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- We report microwave spectroscopy of Josephson junctions chains made from an epitaxial Al/InAs heterostructure.
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