How to systematically map out a Majorana island

ORAL

Abstract

As a high-quality hybrid system, InSb nanowires with epitaxial-grown Al shells reveal ballistic superconductivity and quantized zero-bias conductance peak. This holds great promise for the realization of Majorana-based topological quantum computing. The building block for a topological qubit is a superconductor-semiconductor island hosting a pair of Majorana zero modes (called Majorana island). The state of the topological qubit is the combination of the even/odd parity of such Majorana islands. Therefore, to understand the status of the topological qubit, systematic studies of a Majorana island are crucial. First, by performing tunnelling spectroscopy measurements, we use the ballistic superconductivity and quantized zero-bias peak to support the high-quality and potential ‘Majorana’ properties of the island. Secondly, the even-odd ground state phase diagram as a function of chemical potential is mapped out and provides a guideline for the topological qubit. Thirdly, how the superconducting gap and effective g-factor influence the phase diagram is also studied. Such a systematic mapping of the Majorana island is also suitable for double islands, leading towards topological qubits based on multiple islands.

*Dutch Organization for Scientific Research and Microsoft Corp. Station Q.

–

Presenters

  • Jie Shen

    • Delft University of Technology

Authors

  • Jie Shen

    • Delft University of Technology

  • Francesco Borsoi

    • Delft University of Technology
    • QuTech, Delft University of Technology
    • Delft University of Technology, QuTech

  • Sebastian Heedt

    • Delft University of Technology
    • QuTech, Delft University of Technology

  • Bernard Van Heck

    • Microsoft
    • Microsoft Station Q, UCSB
    • Microsoft Station Q, Microsoft Quantum
    • Station Q, Microsoft Corp
    • Microsoft Station Q Santa Barbara
    • Station Q, Microsoft Research
    • Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark and Microsoft Quantum, Microsoft Sta
    • Station Q, Microsoft

  • Sasa Gazibegovic

    • Applied Physics, Eindhoven University of Technology
    • Eindhoven University of Technology
    • Applied Physics, Eindhoven Univ. of Technology
    • Department of Applied Physics, Eindhoven University of Technology
    • TU Eindhoven
    • Eindhoven University of Technology, Department of Applied Physics

  • Roy L. M. Op het Veld

    • Department of Applied Physics, Eindhoven University of Technology
    • TU Eindhoven
    • Eindhoven University of Technology, Department of Applied Physics
    • Eindhoven University of Technology

  • John A Logan

    • University of California Santa Barbara, Materials Engineering
    • University of California, Santa Barbara

  • Mihir Pendharkar

    • University of California - Santa Barbara
    • University of California Santa Barbara
    • Dept. of ECE, University of California Santa Barbara
    • Department of Electrical and Computer Engineering, University of California, Santa Barbara
    • Electrical and Computer Engineering, University of California, Santa Barbara
    • University of California Santa Barbara, Materials Engineering
    • University of California, Santa Barbara

  • Marina Quintero Perez

    • Microsoft Station Q at Delft University of Technology
    • Microsoft Station Q Delft
    • Station Q, Microsoft Research

  • Nick van Loo

    • Delft University of Technology

  • Alexandra Fursina

    • Microsoft Station Q at Delft University of Technology
    • Station Q, Microsoft Research

  • Kevin Van Hoogdalem

    • Microsoft Station Q at Delft University of Technology
    • Microsoft Station Q Delft
    • Station Q, Microsoft Research

  • Chris Palmstrom

    • University of California, Santa Barbara
    • University of California - Santa Barbara
    • University of California Santa Barbara
    • Electrical & Computer Engineering, University of California, Santa Barbara
    • ECE and Materials, University of California, Santa Barbara
    • Dept. of ECE, University of California Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • University of California Santa Barbara, Materials Engineering
    • Departments of Electrical and Computer Engineering and Materials, University of California, Santa Barbara

  • Erik P. A. M. Bakkers

    • Applied Physics, Eindhoven University of Technology
    • Eindhoven University of Technology
    • Applied Physics, Eindhoven Univ. of Technology
    • Department of Applied Physics, Eindhoven University of Technology
    • TU Eindhoven
    • Eindhoven University of Technology, Department of Applied Physics
    • Physics, TU Eindhoven

  • Leo Kouwenhoven

    • Station Q, Microsoft Research
    • Station Q Delft, Microsoft