Sn-InAs nanowire based superconducting qubit

ORAL

Abstract

With larger induced superconducting gap and high magnetic field resilience[1], Tin (Sn)-based hybrid superconductor-semiconductor nanowire Josephson junctions have recently exhibited superior performance in DC transport measurements. They are emerging as an alternative to Aluminum for hybrid superconductor-semiconductor studies. In this context, we aim to advance the field by utilizing Sn-based nanowire junctions to create superconducting qubits. We demonstrate transmon qubits using Sn-InAs nanowire Josephson junctions with microsecond coherence times and reduced anharmonicity compared to conventional AlOx based transmons. We examine how the interface between superconducting leads and Tin (Sn) influence the coherence times of these nanowire-based qubits and discuss ways to improve it.



[1] M. Pendharkar., et al., Science 372, 508(2021)

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Presenters

  • Amrita Purkayastha

    University of Pittsburgh

Authors

  • Amrita Purkayastha

    University of Pittsburgh

  • Param J Patel

    University of Pittsburgh

  • Amritesh Sharma

    University of Pittsburgh

  • Connor Dempsey

    University of California, Santa Barbara, University of California Santa Barbara

  • Mihir Pendharkar

    Stanford University, Stanford Institute for Materials & Energy Sciences, Stanford University

  • Kun Zuo

    University of Sydney, ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, The University of Sydney, Sydney, NSW, 2006, Riken Center for Quantum Computing (RQC)

  • Moira Hocevar

    Institut Néel CNRS

  • Chris Palmstrom

    University of California, Santa Barbara

  • Michael Hatridge

    University of Pittsburgh

  • Sergey Frolov

    University of Pittsburgh