Print Email Facebook Twitter Exciton Transport in a Germanium Quantum Dot Ladder Title Exciton Transport in a Germanium Quantum Dot Ladder Author Hsiao, T. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Cova Fariña, P. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Oosterhout, S.D. (TU Delft BUS/TNO STAFF; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft; TNO) Jirovec, D. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Zhang, X. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) van Diepen, C.J. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Lawrie, W.I.L. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Wang, C.A. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Sammak, A. (TU Delft BUS/TNO STAFF; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft; TNO) Scappucci, G. (TU Delft QCD/Scappucci Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Veldhorst, M. (TU Delft QN/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Vandersypen, L.M.K. (TU Delft QuTech Advanced Research Centre; TU Delft QN/Vandersypen Lab; Kavli institute of nanoscience Delft) Date 2024 Abstract Quantum systems with engineered Hamiltonians can be used to study many-body physics problems to provide insights beyond the capabilities of classical computers. Semiconductor gate-defined quantum dot arrays have emerged as a versatile platform for realizing generalized Fermi-Hubbard physics, one of the richest playgrounds in condensed matter physics. In this work, we employ a germanium 4×2 quantum dot array and show that the naturally occurring long-range Coulomb interaction can lead to exciton formation and transport. We tune the quantum dot ladder into two capacitively coupled channels and exploit Coulomb drag to probe the binding of electrons and holes. Specifically, we shuttle an electron through one leg of the ladder and observe that a hole is dragged along in the second leg under the right conditions. This corresponds to a transition from single-electron transport in one leg to exciton transport along the ladder. Our work paves the way for the study of excitonic states of matter in quantum dot arrays. To reference this document use: http://resolver.tudelft.nl/uuid:552766c2-3cfc-439d-9091-9a88e28e1b9c DOI https://doi.org/10.1103/PhysRevX.14.011048 ISSN 2160-3308 Source Physical Review B, 14 (1) Part of collection Institutional Repository Document type journal article Rights © 2024 T. Hsiao, P. Cova Fariña, S.D. Oosterhout, D. Jirovec, X. Zhang, C.J. van Diepen, W.I.L. Lawrie, C.A. Wang, A. Sammak, G. Scappucci, M. Veldhorst, L.M.K. Vandersypen Files PDF PhysRevX.14.011048.pdf 5.2 MB Close viewer /islandora/object/uuid:552766c2-3cfc-439d-9091-9a88e28e1b9c/datastream/OBJ/view