The effects of disorder in superconducting materials on qubit coherence.

ABSTRACT: Introducing disorder in the superconducting materials has been considered promising to enhance the electromagnetic impedance and realize noise-resilient superconducting qubits. Despite a number of pioneering implementations, the understanding of the correlation between the material disorder and the qubit coherence is still developing. Here, we demonstrate a systematic characterization of fluxonium qubits with the superinductors made by spinodal titanium-aluminum-nitride with varied disorder. From qubit noise spectroscopy, the flux noise and the dielectric loss are extracted as a measure of the coherence properties. Our results reveal that the 1/f ^α flux noise dominates the qubit decoherence around the flux-frustration point, strongly correlated with the material disorder; while

SUBMITTER: Gao R 

PROVIDER: S-EPMC12003810 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature