Granular aluminum meandered superinductors for quantum circuits

ORAL

Abstract

We report on the optimization, fabrication, and characterization of superinductors made of meandered nanowires of strongly disordered (granular) Aluminum [1]. Superinductors are essential for numerous superconducting quantum circuits operating at millikelvin temperatures. We succeeded in increasing the self-resonance frequency of superinductors by the optimization of its in-plane dimensions. These compact superinductors are beneficial for a wide range of applications, from superconducting circuits for quantum computing to microwave elements of cryogenic parametric amplifiers and kinetic-inductance photon detectors. We have also demonstrated that the superinductors based on granular Aluminum films can be integrated in “hybrid” superconducting circuits containing conventional Al-Al2O3-Al Josephson junctions.

[1] P. Kamenov, W.-S. Lu, K. Kalashnikov, T. DiNapoli, M. T. Bell, and M. E. Gershenson, “Granular aluminum meandered superinductors for quantum circuits,” arXiv:1910.00996 (2019).

*The work at Rutgers University was supported by the NSF award DMR1708954 and the ARO award W911NF-17-C-0024. The work at the University of Massachusetts Boston was supported in part by a 2019 Google Faculty Research Award and NSF Awards No. ECCS-1608448, DUE-1723511, and DMR-1838979.

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Presenters

  • Plamen Kamenov

    • Rutgers University, New Brunswick

Authors

  • Plamen Kamenov

    • Rutgers University, New Brunswick

  • Wen-Sen Lu

    • Rutgers University, New Brunswick

  • Konstantin Kalashnikov

    • Rutgers University, New Brunswick

  • Thomas J DiNapoli

    • Rutgers University, New Brunswick

  • Matthew T Bell

    • University of Massachusetts, Boston
    • Engineering Department, University of Massachusetts Boston, Boston, MA

  • Michael Gershenson

    • Rutgers University, New Brunswick