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Origin and Reduction of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>1</mml:mn><mml:mo stretchy="false">/</mml:mo><mml:mi>f</mml:mi></mml:math> Magnetic Flux Noise in Superconducting Devices
Low-frequency $1/f$ noise in magnetic flux is a dominant source of dephasing in superconducting qubits. Its origin has been a longstanding open question in condensed matter and device physics. The authors identify adsorbed O${}_{2}$ (paramagnetic, due to its spin triplet state) as the major contributor to magnetism and flux noise …