Flicker (1/f) Noise in Percolation Networks

  • R. Rammal
Part of the Springer Proceedings in Physics book series (SPPHY, volume 5)


Statistical self-similarity is emerging as an important concept underlying the behavior of disordered systems. In percolation clusters, for example, the fractal dimension has been identified first /1/. Much later, the notion of spectral dimension /2/ was introduced in order to describe the spectrum of the Laplacian operator, which appears in a large variety of linear physical problems. Another intrinsic property is the recently introduced spreading dimension /3/. Intuitively, it is plausible that an infinite number of exponents must be used to characterize a fractal. In the following, we show that at least one physically measurable quantity, the magnitude (not the frequency dependence) of the resistance noise spectrum (1/f noise) depends on a new exponent pertaining to fractal lattices. We show that this exponent, b, can be seen as a member of an infinite family of exponents, which includes the fractal and spectral dimensions. Physically, the exponent b comes from a well-known fact in the 1/f noise problem: the macroscopic mean square resistance fluctuations are much more sensitive to local inhomogeneities than the square of the macroscopic resistance itself.


Percolation Cluster Sierpinski Gasket Bond Percolation Relative Noise Percolation Network 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • R. Rammal
    • 1
  1. 1.Centre de Recherches sur les Très Basses TempératuresCNRSGrenoble CédexFrance

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