Electron Waiting Times in a Strongly Interacting Quantum Dot
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-08-25
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en
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7
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Physical Review Letters, Volume 127, issue 9
Abstract
Distributions of electron waiting times have been measured in several recent experiments and have been shown to provide complementary information compared with what can be learned from the electric current fluctuations. Existing theories, however, are restricted to either weakly coupled nanostructures or phase-coherent transport in mesoscopic conductors. Here, we consider an interacting quantum dot and develop a real-time diagrammatic theory of waiting time distributions that can treat the interesting regime, in which both interaction effects and higher-order tunneling processes are important. Specifically, we find that our quantum-mechanical theory captures higher-order tunneling processes at low temperatures, which are not included in a classical description, and which dramatically affect the waiting times by allowing fast tunneling processes inside the Coulomb blockade region. Our work paves the way for systematic investigations of temporal fluctuations in interacting quantum systems, for example close to a Kondo resonance or in a Luttinger liquid.Description
Funding Information: We thank A. Braggio for useful discussions. This work was supported by the German Research Foundation (DFG) within the Collaborative Research Centre (SFB) 1242 “Non-Equilibrium Dynamics of Condensed Matter in the Time Domain” (Project No. 278162697) and the Ministry of Innovation NRW via the “Programm zur Förderung der Rückkehr des Hochqualifizierten Forschungsnachwuchses aus dem Ausland.” The work of C. F. was supported by Academy of Finland through the Finnish Centre of Excellence in Quantum Technology (Projects No. 312057 and No. 312299) and Project No. 308515. P. S. acknowledges support from the German National Academy of Sciences Leopoldina (Grant No. LPDS 2019-10). Publisher Copyright: © 2021 American Physical Society.
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Stegmann , P , Sothmann , B , König , J & Flindt , C 2021 , ' Electron Waiting Times in a Strongly Interacting Quantum Dot : Interaction Effects and Higher-Order Tunneling Processes ' , Physical Review Letters , vol. 127 , no. 9 , 096803 . https://doi.org/10.1103/PhysRevLett.127.096803