Real-Time Detection and Control of Correlated Charge Tunneling in a Quantum Dot

authored by: Johannes C. Bayer, Fredrik Brange, Adrian Schmidt, Timo Wagner, Eddy P. Rugeramigabo, Christian Flindt, Rolf J. Haug
Abstract: We experimentally demonstrate the real-Time detection and control of correlated charge tunneling in a dynamically driven quantum dot. Specifically, we measure the joint distribution of waiting times between tunneling charges and show that the waiting times for holes may be strongly correlated due to the periodic drive and the Coulomb interactions on the dot, although the electron waiting times are not. Our measurements are in excellent agreement with a theoretical model that allows us to develop a detailed understanding of the correlated tunneling events. We also demonstrate that the degree of correlations can be controlled by the drive. Our experiment paves the way for systematic real-Time investigations of correlated electron transport in low-dimensional nanostructures.
Organisation(s): Institute of Solid State Physics
External Organisation(s): Physikalisch-Technische Bundesanstalt PTB
Aalto University
Karlsruhe Institute of Technology (KIT)
Center for Quantum Computing
Type: Article
Journal: Physical review letters
Volume: 134
ISSN: 0031-9007
Publication date: 31.01.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://doi.org/10.1103/PhysRevLett.134.046303 (Access: Open)
https://doi.org/10.1103/PhysRevLett.134.046303 (Access: Closed)

BibTeX

@article{c58954fb304349f489706ee1978f3e30,
title = "Real-Time Detection and Control of Correlated Charge Tunneling in a Quantum Dot",
abstract = "We experimentally demonstrate the real-Time detection and control of correlated charge tunneling in a dynamically driven quantum dot. Specifically, we measure the joint distribution of waiting times between tunneling charges and show that the waiting times for holes may be strongly correlated due to the periodic drive and the Coulomb interactions on the dot, although the electron waiting times are not. Our measurements are in excellent agreement with a theoretical model that allows us to develop a detailed understanding of the correlated tunneling events. We also demonstrate that the degree of correlations can be controlled by the drive. Our experiment paves the way for systematic real-Time investigations of correlated electron transport in low-dimensional nanostructures.",
author = "Bayer, {Johannes C.} and Fredrik Brange and Adrian Schmidt and Timo Wagner and Rugeramigabo, {Eddy P.} and Christian Flindt and Haug, {Rolf J.}",
note = "Publisher Copyright: {\textcopyright} 2025 American Physical Society.",
year = "2025",
month = jan,
day = "31",
doi = "10.1103/PhysRevLett.134.046303",
language = "English",
volume = "134",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "4",
}