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What is Magnetic Vortex Losses in Niobium Qubits about?

This study quantifies the microwave losses caused by trapped magnetic vortices in niobium superconductors at millikelvin temperatures, which is crucial for the performance of quantum devices. The findings reveal that magnetic flux contributes approximately 2 nΩ/mG at 10 mK and that losses become significant at trapped magnetic field levels above 100 mG, particularly in the presence of niobium pentoxide. The results emphasize the importance of magnetic shielding to maintain high quality factors in niobium-ba

Author

JOANDERSON RODRIGUES ARAUJO DA SILVA

Language

EN