Statistics of extremal intensities for Gaussian interfaces

Details Statistics of extremal intensities for Gaussian interfaces Statistics of extremal intensities for Gaussian interfaces

2003-07-25

arxiv.org/abs/cond-mat/0307645v1

Physics

Condensed Matter

Statistical Mechanics

15 pages, including 7 ps figures

Scientific paper

The extremal Fourier intensities are studied for stationary Edwards-Wilkinson-type, Gaussian, interfaces with power-law dispersion. We calculate the probability distribution of the maximal intensity and find that, generically, it does not coincide with the distribution of the integrated power spectrum (i.e. roughness of the surface), nor does it obey any of the known extreme statistics limit distributions. The Fisher-Tippett-Gumbel limit distribution is, however, recovered in three cases: (i) in the non-dispersive (white noise) limit, (ii) for high dimensions, and (iii) when only short-wavelength modes are kept. In the last two cases the limit distribution emerges in novel scenarios.

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