Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Asymmetric quantum shot noise in quantum dots.

Hans-Andreas Engel1, Daniel Loss

  • 1Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.

Physical Review Letters
|November 5, 2004
PubMed
Summary

We analyzed frequency-dependent noise in quantum dots, revealing steps and super-Poissonian behavior. This offers new ways to study quantum current fluctuations experimentally.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Readout Sweet Spots for Spin Qubits with Strong Spin-Orbit Interaction.

Physical review letters·2026
Same author

The origins of noise in the Zeeman splitting of spin qubits in natural-silicon devices.

NPJ quantum information·2026
Same author

High-Temperature Superconductivity from Finite-Range Attractive Interaction.

Physical review letters·2025
Same author

Toward Gate-Tunable Topological Superconductivity in a Supramolecular Electron Spin Lattice.

Nano letters·2025
Same author

Compromise-free scaling of qubit speed and coherence.

Nature communications·2025
Same author

A dephasing sweet spot with enhanced dipolar coupling.

Communications physics·2025

Area of Science:

  • Condensed matter physics
  • Quantum electronics

Background:

  • Understanding quantum dot noise is crucial for quantum device applications.
  • Coulomb blockade regime in quantum dots influences electron transport properties.

Purpose of the Study:

  • To analyze the frequency-dependent noise of current through a quantum dot.
  • To investigate quantum fluctuations of current in the Coulomb blockade regime.

Main Methods:

  • Analysis of frequency-dependent noise in a quantum dot coupled to Fermi leads.
  • Exact calculation for a single dot level.
  • Perturbative evaluation in Born approximation for multi-level systems.

Main Results:

  • Asymmetric shot noise exhibits steps as a function of detection frequency.
  • Shot noise becomes super-Poissonian, indicating quantum fluctuations.
  • Demonstrated experimental access to these quantum fluctuations.

Conclusions:

  • Frequency-dependent noise analysis provides a novel method for probing quantum fluctuations.
  • The observed super-Poissonian noise is a signature of quantum effects in electron transport.
  • Theoretical models are validated for both single and multi-level quantum dot systems.

Related Experiment Videos