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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.
|Number of pages||7|
|Journal||Physical Review Letters|
|Publication status||Published - 25 Aug 2021|
|MoE publication type||A1 Journal article-refereed|
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- 1 Finished
Finnish Centre of Excellence in Quantum Technology
Flindt, C., Potanina, E., Burset Atienza, P. & Pyhäranta, T.
01/01/2018 → 31/12/2020
Project: Academy of Finland: Other research funding