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Updated: Oct 20, 2025
11:33
All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
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Electron Waiting Times in a Strongly Interacting Quantum Dot: Interaction Effects and Higher-Order Tunneling
Philipp Stegmann1, Björn Sothmann1, Jürgen König1
1Theoretische Physik, Universität Duisburg-Essen and CENIDE, 47048 Duisburg, Germany.
Physical Review Letters
|September 10, 2021
Summary
This study introduces a new quantum theory for electron waiting times in interacting quantum dots. The theory captures higher-order tunneling, revealing new insights into electron transport dynamics.
Area of Science:
- Quantum electronics
- Mesoscopic physics
- Electron transport
Background:
- Electron waiting time distributions offer insights beyond electric current fluctuations.
- Current theories are limited to weakly coupled nanostructures or phase-coherent transport.
Purpose of the Study:
- To develop a real-time diagrammatic theory for waiting time distributions in interacting quantum dots.
- To investigate regimes with significant interaction effects and higher-order tunneling.
Main Methods:
- Development of a novel quantum-mechanical, real-time diagrammatic theory.
- Application to interacting quantum dot systems.
Main Results:
- The theory successfully incorporates higher-order tunneling processes, crucial at low temperatures.
- These processes, absent in classical descriptions, significantly alter waiting times within the Coulomb blockade region.
- Demonstrated ability to capture fast tunneling events inside the Coulomb blockade.
Conclusions:
- The developed theory provides a powerful tool for studying temporal fluctuations in interacting quantum systems.
- Enables systematic investigations near phenomena like Kondo resonance or in Luttinger liquids.
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