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quant-ph2026
Epitaxial NbN-junction-based self-shunted superconducting flux qubit with high anharmonicity
Tokunoshin Uchida, Shingo Nozaki, Daiki Kurihara +5
We report a demonstration of a self-shunted superconducting flux qubit (SSFQ) as an ultracompact, strongly anharmonic, and long-lifetime qubit by using the full epitaxially grown N…
quant-ph2026
Systematic frequency-collision analysis of the cross-resonance gate outside the straddling regime
Shinichi Inoue, Shotaro Shirai, Shuhei Tamate +4
Frequency crowding remains a major obstacle to scaling fixed-frequency transmon processors. Among the widely used all-microwave two-qubit gates, the cross-resonance (CR) gate is pa…