Origin and Reduction of 1 / f Magnetic Flux Noise in Superconducting Devices
By P. Kumar, S. Sendelbach, M. Beck, J. Freeland, Zhe Wang, Hui Wang, Clare C. Yu, R. Wu, David P. Pappas, R. McDermott. 2016
145 citations recorded by the source corpus.
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 in superconducting thin-film devices, and show that improving a sample's vacuum environment leads to significant noise reduction. These results open the door to improved superconducting sensors and qubits with enhanced coherence times.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/986b0c877ea9df1bdebe3211dbd2c4dd4bab0de7
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Materials challenges and opportunities for quantum computing hardware (2021, background): “Recent studies showed that the flux noise can be reduced by preventing adsorption of gas species on the metal surfaces and formation of the native oxide ( 105 , 116 ).”
- Tunable Superconducting Qubits with Flux-Independent Coherence (2017, background): “Recent progress in understanding the origins of 1=f flux noise in SQUIDs [46] has facilitated up to a 5×reduction inAΦ [47].”