QUEST 2025
Planar SFQ Circuits for Simplified Superconducting Qubit Control
Shay Hacohen-Gourgy (Technion - Israel Institute of Technology)
Single-flux-quantum (SFQ) logic promises picosecond timing and sub-attojoule switching, yet widespread adoption is hindered by reliance on complex multilayer niobium foundries. We introduce a fully planar SFQ circuit designed for superconducting qubit control, requiring only straightforward lithography accessible to standard university fabrication facilities. Demonstrating qubit driving at 10 mK, we identify and address key challenges including microwave cross-talk, local heating, and nonequilibrium quasiparticle generation, proposing effective mitigation strategies. Our simplified planar layout offers researchers a practical entry point to high-performance, cryogenic few-qubit control, significantly reducing barriers related to fabrication complexity.
Acknowledgement
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Invited
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Device and Circuit
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October 28, 15:45 → 16:10