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Parity dependent supercurrent amplitude and phase of InSb/Al hybridized island

ORAL

Abstract

Semiconductor nanowires coupled with superconductors are a promising platform to construct Majorana zero modes as well as to build up topological fault-tolerant quantum computers. In semiconductor nanowire/superconductor hybridized island, charging energies are introduced and thus even/odd parity of two Majorana zero modes exhibit as a two-level quantum system, which could work as topological qubits. By embedding such hybridized islands into superconducting circuit, not only can trivial Andreev bound states and Majorana bound states be distinguished via the supercurrent phase of the island, but also topological-qubit readout and operation can be performed by supercurrent measurement. Here, we insert an InSb/Al hybridized island into NbTiN superconducting circuit forming a superconducting interference device (SQUID). In such a device, we find switching current of the InSb/Al island depends on its parity and the corresponding superconducting phase also show parity-dependent behaviours. In this way, the parity of bound state residing in hybridized island can be read out, which paves the way for parity read out of Majorana superconducting qubits.

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Presenters

  • Jiyin Wang

    Delft University of Technology

Authors

  • Jiyin Wang

    Delft University of Technology

  • Constantin Schrade

    Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology

  • Vukan Levajac

    Delft University of Technology

  • David van Driel

    Delft University of Technology

  • Sasa Gazibegovic

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Department of Applied Physics, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven

  • Roy Op het Veld

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven, Department of Applied Physics, Eindhoven University of Technology

  • Kongyi Li

    Delft University of Technology

  • Joon Sue Lee

    IEE, UC Santa Barbara, University of California Santa Barbara

  • Mihir Pendharkar

    Dept. of Electrical Engineering, Univ. of California, Santa Barbara, CA, USA, IEE, UC Santa Barbara, University of California Santa Barbara, Univ of California, Santa Barbara, Electrical and Computer Engineering, University of California Santa Barbara, Electrical & Computer Engineering, University of California, Santa Barbara, University of California, Santa Barbara

  • connor dempsey

    Dept. of Electrical Engineering, Univ. of California, Santa Barbara, CA, USA, IEE, UC Santa Barbara, University of California Santa Barbara

  • Chris J Palmstrom

    Materials Department, University of California, Santa Barbara, UCSB, Departments of Electrical and Computer Engineering and Materials, University of California, Santa Barbara, Dept. of Electrical Engineering, Univ. of California, Santa Barbara, CA, USA, Univ. of California, Santa Barbara, Electrical and Computer Engineering Department, University of California, Santa Barbara, University of California, Santa Barbara, IEE, UC Santa Barbara, University of California Santa Barbara, Univ of California, Santa Barbara, Electrical and Computer Engineering, University of California Santa Barbara, Materials and Electrical & Comp. Eng, University of California, Santa Barbara

  • Erik Bakkers

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Department of Applied Physics, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven, Applied Physics, Eindhoven University of Technology

  • Liang Fu

    Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT, Department of Physics, Massachusetts Institute of Technology MIT, Physics, MIT, Physics, Massachusetts Institute of Technology, MIT

  • Leo P Kouwenhoven

    Dept. of Physics, Technical University, Delft, The Netherlands, Microsoft Quantum Lab Delft, Microsoft Quantum Lab Delft, Delft University of Technology, Microsoft Corp Delft, Quantum Lab Delft, Microsoft, Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Microsoft Corp

  • Jie Shen

    TU Delft, Delft University of Technology