Towards a transmon qubit with gate-controlled Sn-InSb Josephson Junction

ORAL

Abstract

We report our experimental progress towards realizing gate tunable superconducting transmon qubit with the newly developed superconducting Sn shells on InSb nanowire as Josephson element. Gate tunable superconducting transmon qubits have previously been demonstrated with Al-InAs nanowire weak- link josephson junctions. These nanowire-based qubits are interesting for their gate tunability and high magnetic field compatibility. In our work, the readout circuit is made of high internal quality factor NbTiN co-planar waveguide resonators. With spectroscopic and time domain measurements we characterize and report on the relaxation and coherence times of these qubits.

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Presenters

  • Amrita Purkayastha

    • University of Pittsburgh

Authors

  • Amrita Purkayastha

    • University of Pittsburgh

  • Param J Patel

    • University of Pittsburgh

  • Azarin Zarassi

    • University of Southern California

  • Mihir Pendharkar

    • Stanford Univ
    • Stanford University

  • Connor P Dempsey

    • University of California, Santa Barbara
    • Electrical and Computer Engineering, University of California Santa Barbara, Santa Barbara, California 93106, USA
    • University of California in Santa Barbara
    • University of California Santa Barbara

  • Ghada Badawy

    • Eindhoven University of Technology

  • Erik P. A. M. Bakkers

    • Eindhoven University of Technology

  • Chris J Palmstrom

    • University of California, Santa Barbara

  • Michael J Hatridge

    • University of Pittsburgh

  • Sergey M Frolov

    • University of Pittsburgh