Resist-free shadow deposition via etched silicon trenches produces Al-AlOx-Al Josephson junctions with median qubit energy relaxation times of 184 microseconds and minimal substrate-metal interface contamination.
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Ta encapsulation of Nb resonators raises internal quality factor to 2.4 million and improves six-month stability by reducing two-level system losses at the metal-air interface.
citing papers explorer
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Resist-free shadow deposition using silicon trenches for Josephson junctions in superconducting qubits
Resist-free shadow deposition via etched silicon trenches produces Al-AlOx-Al Josephson junctions with median qubit energy relaxation times of 184 microseconds and minimal substrate-metal interface contamination.
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Tantalum-Encapsulated Niobium Superconducting Resonators: High Internal Quality Factor and Improved Temporal Stability via Surface Passivation
Ta encapsulation of Nb resonators raises internal quality factor to 2.4 million and improves six-month stability by reducing two-level system losses at the metal-air interface.