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2x2 quantum dot arrays in Si/SiGe

ORAL

Abstract

Great progress has been made with silicon in scaling up the number of quantum dots in linear arrays, with realizations of up to nine quantum dots. However, a crucial requirement for quantum computation is the ability to engineer two-dimensional quantum dot arrays. This step will increase qubit interconnectivity and could enable to perform quantum error correction using the surface code. Here, we present the realization of two-dimensional silicon quantum dot arrays, defined in isotopically enriched Si/SiGe heterostructures using single layer and overlapping gate schemes. We show that quantum dots can be tuned to the single-electron regime, as confirmed by simultaneous charge sensing using two nearby quantum dot charge sensors. We concentrate on experimental results in gaining control over the quantum dot system focusing on quantum information processing with quantum dots realized in two-dimensional arrays.

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Presenters

  • Marcel Meyer

    QuTech, Delft University of Technology

Authors

  • Marcel Meyer

    QuTech, Delft University of Technology

  • Florian Unseld

    QuTech, Delft University of Technology

  • Chien-An Wang

    QuTech, Delft University of Technology

  • Luca Petit

    QuTech, Delft University of Technology, Delft University of Technology

  • Sergei Amitonov

    Delft University of Technology, QuTech, Delft University of Technology

  • Harmen Gerrit Johan Eenink

    QuTech, Delft University of Technology

  • Nico Hendrickx

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

  • Kostas Tsoukalas

    QuTech, Delft University of Technology

  • Anne-Marije Zwerver

    Delft University of Technology, QuTech, Delft University of Technology

  • Mateusz T Madzik

    Delft University of Technology, QuTech, Delft University of Technology, Univ of New South Wales

  • Will Lawrie

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

  • Delphine Brousse

    TNO, QuTech, Delft University of Technology

  • Amir Sammak

    QuTech and Netherlands Organisation for Applied Scientific Research (TNO), TNO, QuTech, Delft University of Technology, Netherlands Organization for Applied Scientific Research (TNO), Delft University of Technology

  • Giordano Scappucci

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

  • Lieven Vandersypen

    Delft University of Technology, Qutech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Qutech, Delft University of Technology

  • Menno Veldhorst

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