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. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000666040Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Physical Review XBand
Seiten / Artikelnummer
Verlag
American Physical SocietyOrganisationseinheit
09753 - Demler, Eugene / Demler, Eugene
Förderung
212899 - Non-perturbative approaches to strongly correlated many-body systems (SNF)