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A unified and universal explanation for Lévy laws and 1/f noises Export

Proceedings of the National Academy of Sciences, Vol. 106, No. 30. (28 July 2009), pp. 12251-12254.

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frequency noise physics statistics stochastic theory

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10.1073/pnas.0900299106 Lévy laws and 1/ noises are shown to emerge uniquely and universally from a general model of systems which superimpose the transmissions of many independent stochastic signals. The signals are considered to follow, statistically, a common—yet arbitrary—generic signal pattern which may be either stationary or dissipative. Each signal is considered to have its own random transmission amplitude and frequency. We characterize the amplitude-frequency randomizations which render the system output's stationary law and power-spectrum universal—i.e., independent of the underlying generic signal pattern. The classes of universal stationary laws and power spectra are shown to coincide, respectively, with the classes of Lévy laws and 1/ noises—thus providing a unified and universal explanation for the ubiquity of these classes of “anomalous statistics” in various fields of science and engineering.


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