A three site Kitaev chain in InSb/Al nanowire hybrid.

ORAL

Abstract

Recent technological advancements in the fabrication of semiconductor/superconductor hybrid nanowire devices have enabled the experimental realization of a minimal Kitaev chain within a quantum dot (QD) – superconductor (SC) – quantum dot (QD) configuration[1]. Electrostatic control of crucial parameters, such as Crossed Andreev Reflection (CAR) and Elastic Co-Tunneling (ECT), allows for precise tuning of the system along the chain, providing a basis for scalable control [2]. I will present the experimental realization of a three-site Kitaev chain in a QD-SC-QD-SC-QD device. This scaling holds promise in terms of enhancing the protection of the zero modes within the system, surpassing that of a two-site chain. Additionally, I will explore the impact of the superconducting phase difference on the spectrum of the three-site chain.

[1] Dvir, T., Wang, G., van Loo, N., Liu, C.X., Mazur, G.P., Bordin, A., Ten Haaf, S.L., Wang, J.Y., van Driel, D., Zatelli, F. and Li, X., 2023. Realization of a minimal Kitaev chain in coupled quantum dots. Nature, 614(7948), pp.445-450.

[2] Bordin, A., Li, X., van Driel, D., Wolff, J.C., Wang, Q., ten Haaf, S.L., Wang, G., van Loo, N., Kouwenhoven, L.P. and Dvir, T., 2023. Crossed Andreev reflection and elastic co-tunneling in a three-site Kitaev chain nanowire device. arXiv preprint arXiv:2306.07696.

*We acknolwege support of the Dutch organization for scientific research (NWO) and Microsoft Corporation.

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Presenters

  • Grzegorz P Mazur

    • Delft University of Technology

Authors

  • Grzegorz P Mazur

    • Delft University of Technology

  • Alberto Bordin

    • Delft University of Technology

  • Tom Dvir

    • Delft University of Technology

  • Chunxiao Liu

    • Delft University of Technology
    • University of Maryland, College Park

  • Guanzhong Wang

    • Delft University of Technology

  • Francesco Zatelli

    • Delft University of Technology

  • Nick van Loo

    • Delft University of Technology

  • Jan Cornelis Wolff

    • QuTech and Kavli Institute for Nanoscience, Delft University of Technology
    • Delft University of Technology

  • Michael Wimmer

    • Delft University of Technology
    • QuTech and Kavli Institute for Nanoscience, TU Delft

  • Ghada Badawy

    • Eindhoven University of Technology

  • Sasa Gazibegovic

    • Eindhoven University of Technology

  • Erik P. A. M. Bakkers

    • Eindhoven University of Technology
    • TU Eindhoven

  • Leo P Kouwenhoven

    • Delft University of Technology