Noise characterization of suspended Josephson junction arrays
ORAL
Abstract
Superinductors are an essential component of many superconducting qubit designs, including fluxonium or the 0-π qubit. One of the most popular methods to realize such superinductors is an array of Josephson junctions, where their quality will impact the qubit's coherence. In this work, we investigate noise and instabilities affecting these arrays, such as arising from phase slips or nonequilibrium quasiparticles, where the arrays are either situated on a silicon substrate or suspended in vacuum above the substrate. Arrays of different junction number and geometry are explored to elucidate the noise processes in Josephson junction arrays, informing us how to best design these components to implement in qubit architectures.
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Presenters
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Trevor Chistolini
University of California, Berkeley
Authors
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Trevor Chistolini
University of California, Berkeley
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Christian Juenger
University of California, Berkeley
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Long B Nguyen
Lawrence Berkeley National Laboratory
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Larry Chen
University of California, Berkeley
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Hyunseong Kim
University of California, Berkeley
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David I Santiago
Lawrence Berkeley National Laboratory
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Irfan Siddiqi
University of California, Berkeley, Lawrence Berkeley National Laboratory