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X-ray diffraction and microscopy have definitively identified niobium hydrides as a specific source of decoherence in superconducting qubits, directly linking their formation during cooling cycles to reduced information storage stability. This discovery provides a concrete target for material engineering and fabrication process refinement to mitigate noise and extend qubit coherence times. For the quantum computing sector, resolving this defect is a critical step toward building more accurate and scalable superconducting processors.
X-Ray Data Confirms Niobium Hydrides Limit Qubit Stability

X-ray data confirms that niobium hydrides, defects forming in niobium, contribute to qubit instability and limit quantum information storage.
Researchers have directly linked the formation of “hills” observed on niobium superconducting qubits to the presence of niobium hydrides, a newly identified defect that contributes to quantum decoherence. Using atomic-force microscopy, X-ray diffraction, and mass spectrometry, the team pinpointed these hydrides as a specific source of noise limiting how long qubits can store information, a critical challenge…
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