Publication Date:
2016-10-20
Description:
Author(s): P. Kumar, S. Sendelbach, M. A. Beck, J. W. Freeland, Zhe Wang, Hui Wang, Clare C. Yu, R. Q. Wu, D. P. Pappas, and R. McDermott 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. [Phys. Rev. Applied 6, 041001] Published Tue Oct 18, 2016
Electronic ISSN:
2331-7019
Topics:
Physics
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