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Raw data for: Supercurrent tuning of the Josephson coupling energy

Wisne, Maxwell1; Chandrasekhar, Venkat1

Published Dec 30, 2025 on Dryad. https://doi.org/10.5061/dryad.sqv9s4nhx

Data files

Dec 30, 2025 version files 3.15 MB

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Abstract

The ability to non-dissipatively tune the Josephson coupling energy of Josephson junctions is a useful tool in frequency-tunable qubits. This is typically done by threading magnetic flux through two junctions connected in a loop, a geometry that exposes the qubit to magnetic environmental noise. In this paper, we show that by biasing a junction with supercurrent from a separate pair of superconducting leads coupled to the device, the Josephson energy can be tuned without the need for a flux loop. Our multiterminal device may enable the realization of a frequency-tunable qubit with greatly reduced susceptibility to flux noise.