Global Magnitude Fluctuation Phenomena

  • R. Labbé
Conference paper
Part of the Nonlinear Phenomena and Complex Systems book series (NOPH, volume 9)


Global dynamics in many complex physical systems share a common feature: the fluctuations of some adequately defined global magnitude display non-Gaussian statistics, characterized by a non-symmetric probability density functions (pdf) having an exponential or even superexponential tail. This behavior is believed to be originated by finite size effects along with correlation lengths comparable or larger than the system size. Here, we consider three very different systems: a confined turbulent flow, the 2D XY-model and an experimental realization of the Langevin’s equation. Although in all of these systems we find the features previously mentioned, preliminary result of ongoing research show that some of the universality claims found in the current literature deserve a more detailed study.


Finite Size Effect Instantaneous Power Power Fluctuation Analog Multiplier Multiplier Output 
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Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • R. Labbé
    • 1
  1. 1.Laboratorio de Turbulencia, Departamento de Física, Facultad de CienciaUniversidad de Santiago de ChileSantiagoChile

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