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Generation of Local CA1 γ Oscillations by Tetanic Stimulation
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Universal oscillations in counting statistics.

C Flindt1, C Fricke, F Hohls

  • 1Department of Physics, Harvard University, Cambridge, MA 02138, USA. flindt@physics.harvard.edu

Proceedings of the National Academy of Sciences of the United States of America
|June 12, 2009
PubMed
Summary
This summary is machine-generated.

Researchers measured high-order cumulants of electron transport through quantum dots, revealing universal, factorial-growing oscillations. This discovery offers a unified interpretation of noise correlations and environmental interactions.

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Area of Science:

  • Quantum physics
  • Mesoscopic physics
  • Statistical mechanics

Background:

  • Stochastic processes generate noise from quantum or classical sources.
  • Higher-order cumulants of probability distributions reveal correlations in noise but are hard to measure.

Purpose of the Study:

  • To measure transient cumulants of charge transport through a quantum dot to very high orders (m=15).
  • To investigate the behavior and universality of these high-order cumulants.

Main Methods:

  • Experimental measurement of transient cumulants for electron transport in a quantum dot.
  • Theoretical analysis using properties of high-order derivatives in the complex plane.

Main Results:

  • Observed striking oscillations in cumulants as a function of measurement time for high orders (m).
  • Demonstrated factorial growth in the magnitude of these oscillations with increasing order m.
  • Showed that these oscillations are a universal phenomenon, independent of system parameters.

Conclusions:

  • The observed oscillations and factorial growth in high-order cumulants are universal and system-independent.
  • This provides a unified theoretical framework for interpreting previous studies and new experimental data on noise correlations.