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Showing 1–14 of 14 results
Advanced filters: Author: Ghada Badawy Clear advanced filters

  • The authors realize two- and three-site Kitaev chains in semiconducting quantum dots coupled via superconductors and tune them to the sweet spot where zero-energy Majorana modes appear at the chain ends. To assess Majorana localization, they couple the system to an additional quantum dot.

    • Alberto Bordin
    • Florian J. Bennebroek Evertsz’
    • Leo P. Kouwenhoven
    ResearchOpen Access
    Nature Communications
    Volume: 17, P: 1-8

  • 99 years ago, the 1924 Nobel Prize in Physics was awarded — one year late — to Karl Manne Siegbahn.

    • Ghada Badawy
    Research Highlights
    Nature Reviews Physics
    Volume: 6, P: 578

  • A measurement strategy is described that is able to read out the parity of minimal two-site Kitaev chains in real time, by coupling two Majoranas and resolving their quantum capacitance.

    • Nick van Loo
    • Francesco Zatelli
    • Leo P. Kouwenhoven
    Research
    Nature
    Volume: 650, P: 334-339

  • A three-site Kitaev chain, constructed from three semiconducting quantum dots coupled by superconducting segments in a hybrid InSb/Al nanowire, shows enhanced robustness of edge zero-energy modes against variations in the coupling strengths or electrochemical potentials compared with a chain containing only two quantum dots.

    • Alberto Bordin
    • Chun-Xiao Liu
    • Grzegorz P. Mazur
    ResearchOpen Access
    Nature Nanotechnology
    Volume: 20, P: 726-731

  • A Kitaev chain formed by two quantum dots coupled via a superconductor support the so-called poor man’s Majorana bound states. Here, the authors form a minimal Kitaev chain using Yu-Shiba-Rusinov states and show that the resulting bound states are more robust than in the case of unproximitized quantum dots.

    • Francesco Zatelli
    • David van Driel
    • Tom Dvir
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • Andreev bound states can form in hybrid semiconducting-superconducting devices and can mirror the experimental signatures of the much sought topologically non-trivial Majorana bound states. Here, van Driel, Wang and coauthors present a method of directly measuring the spin-polarized excitation spectrum of Andreev bound states.

    • David van Driel
    • Guanzhong Wang
    • Tom Dvir
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-9

  • Tunneling spectroscopy is widely used to examine the subgap spectra in semiconductor/superconductor nanostructures. Here, the authors develop an alternative type of tunnel probe for InSb-Al hybrid nanowires, enabling study of the spatial extension of Andreev bound states.

    • Vukan Levajac
    • Ji-Yin Wang
    • Leo P. Kouwenhoven
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • The proximity effect in semiconductor-superconductor nanowires is expected to generate an induced gap in the semiconductor. Here, the authors study the superconducting proximity effect in InSb nanowires with an Al/Pt shell, demonstrating control of the induced gap using electric and magnetic fields.

    • Nick van Loo
    • Grzegorz P. Mazur
    • Leo P. Kouwenhoven
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-9

  • Controllable detection of singlet and triplet Cooper pair splitting via crossed Andreev reflection is demonstrated in spin-polarized quantum dots on a superconducting nanowire platform with strong spin–orbit coupling.

    • Guanzhong Wang
    • Tom Dvir
    • Leo P. Kouwenhoven
    Research
    Nature
    Volume: 612, P: 448-453

  • A minimal artificial Kitaev chain can be realized by using two spin-polarized quantum dots in an InSb nanowire strongly coupled by both elastic co-tunnelling and crossed Andreev reflection.

    • Tom Dvir
    • Guanzhong Wang
    • Leo P. Kouwenhoven
    Research
    Nature
    Volume: 614, P: 445-450

  • Advanced fabrication techniques enable a wide range of quantum devices, such as the realization of a topological qubit. Here, the authors introduce an on-chip fabrication technique based on shadow walls to implement topological qubits in an InSb nanowire without fabrication steps such as lithography and etching.

    • Sebastian Heedt
    • Marina Quintero-Pérez
    • Leo P. Kouwenhoven
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-9