Jove
Visualize
Contact Us

Related Experiment Videos

Conductance fluctuations and quantum chaotic scattering in semiconductor microstructures.

C. M. Marcus1, R. M. Westervelt, P. F. Hopkins

  • 1Division of Applied Sciences and Department of Physics, Harvard University, Cambridge, Massachusetts 02138Department of Materials, University of California, Santa Barbara, California 93106.

Chaos (Woodbury, N.Y.)
|October 1, 1993
PubMed
Summary

Experiments on ballistic microstructures reveal quantum chaotic scattering phenomena. Semiclassical analysis explains aperiodic conductance fluctuations, offering insights into electron transport in quantum systems.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same journal

Stochastic Poincaré maps for a slow-fast system with white noises: Approximation and visualization.

Chaos (Woodbury, N.Y.)·2026
Same journal

On a stable torus in a 3D system with a saddle-focus.

Chaos (Woodbury, N.Y.)·2026
Same journal

Targeted interventions suppress epidemic outbreaks in spatial higher-order activity-driven networks.

Chaos (Woodbury, N.Y.)·2026
Same journal

Erratum: "Hierarchical organization of bursty trains in event sequences" [Chaos 35, 113115 (2025)].

Chaos (Woodbury, N.Y.)·2026
Same journal

Deterministic control of CW/CCW alternation by dual-frequency injection in a heterogeneous oscillator ring.

Chaos (Woodbury, N.Y.)·2026
Same journal

A CTRW-driven subdiffusive fractional Brownian bridge in the reconstruction of missing experimental data.

Chaos (Woodbury, N.Y.)·2026
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

Area of Science:

  • Condensed Matter Physics
  • Quantum Chaos
  • Mesoscopic Physics

Background:

  • Ballistic GaAs/AlGaAs microstructures exhibit complex electron transport phenomena.
  • Quantum chaotic scattering governs behavior in these systems at low temperatures.
  • The Landauer-Buttiker formulation provides a framework for coherent transport analysis.

Purpose of the Study:

  • To review recent experiments on aperiodic conductance fluctuations in specific microstructures.
  • To analyze observed phenomena using a semiclassical approach to quantum chaotic scattering.
  • To present novel experimental findings and compare them with theoretical models.

Main Methods:

  • Experiments conducted on stadium billiard and circular GaAs/AlGaAs microstructures.
  • Measurements performed at millikelvin temperatures to ensure ballistic transport.

Related Experiment Videos

  • Utilized point-contact leads for precise electron injection and detection.
  • Employed semiclassical theory for analyzing quantum chaotic scattering.

    • Main Results:

    • Observed aperiodic conductance fluctuations explained by semiclassical theory.
    • Investigated quantum-enhanced backscattering and the power spectrum of fluctuations.
    • Examined crossovers to high-magnetic-field and tunneling regimes.
    • Demonstrated a method for measuring phase-randomizing scattering rates.

    Conclusions:

    • Semiclassical approach effectively describes quantum chaotic scattering in ballistic microstructures.
    • Experimental results align with theoretical predictions for conductance fluctuations.
    • The study provides a method for characterizing scattering processes in quantum systems.