Quantum simulation of exciton transport in a germanium 4x2 quantum dot array

ORAL

Abstract

The field of quantum simulation promises to give insight into a wide range of physical effects which cannot be classically computed due to their high complexity. Electrostatically-defined semiconductor quantum dot arrays are becoming more and more appealing as a quantum simulation platform, as they naturally resemble solid-state systems of correlated electrons in a lattice. Especially, the long-range Coulomb interaction is readily present in quantum dot arrays, a key ingredient for a variety of quantum many-body phenomena such as exciton formation, Wigner crystals and superconductivity. In this work, we show first results of exciton transport through a Germanium 4x2 quantum dot array using the Coulomb drag effect. For this purpose, we show the tunability of the device into the single-charge regime and tunnel coupling control. We explore different signatures of correlated transport through the array by using charge sensing and current measurements. This experiment demonstrates the tunability and operation of a quantum dot ladder and can be a precursor to exciton condensation in quantum dot systems.

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Presenters

  • Pablo Cova Fariña

    • Delft University of Technology

Authors

  • Pablo Cova Fariña

    • Delft University of Technology

  • Tzu-Kan Hsiao

    • Delft University of Technology

  • Xin Zhang

    • Delft University of Technology

  • Cornelis J van Diepen

    • Delft University of Technology

  • Stefan Oosterhout

    • Netherlands Organisation for Applied Scientific Research (TNO)
    • Netherlands Organization for Applied Scientific Research (TNO)

  • Daniel Jirovec

    • Delft University of Technology
    • Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria

  • Amir Sammak

    • TNO, Qutech
    • QuTech and TNO, Stieltjesweg 1, 2628 CK Delft, The Netherlands
    • Netherlands Organisation for Applied Scientific Research (TNO)
    • QuTech and Netherlands Organization for Applied Scientific Research (TNO), Delft, The Netherlands
    • TNO, QuTech
    • TNO
    • Netherlands Organization for Applied Scientific Research (TNO)
    • QuTech and Netherlands Organisation for Applied Scientific Research (TNO), Stieltjesweg 1, 2628 CK Delft, The Netherlands
    • TNO/QuTech

  • William Iain L Lawrie

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands

  • Chien-An Wang

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands

  • Giordano Scappucci

    • QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands
    • Delft University of Technology
    • QuTech and the Kavli Institute of Nanoscience, Delft University of Technology
    • TU Delft QuTech
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands

  • Menno Veldhorst

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands

  • Lieven M Vandersypen

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