Renormalization group evaluation of exponents in family name distributions |
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Authors: | Andrea De Luca Paolo Rossi |
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Affiliation: | a International School for Advanced Studies (Sissa), via Beirut 2-4, I-34014 Trieste, Italy b “E. Fermi” Physics Department, University of Pisa and I.N.F.N. Sezione di Pisa, Italy |
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Abstract: | According to many phenomenological and theoretical studies the distribution of family name frequencies in a population can be asymptotically described by a power law. We show that the Galton-Watson process corresponding to the dynamics of a growing population can be represented in Hilbert space, and its time evolution may be analyzed by renormalization group techniques, thus explaining the origin of the power law and establishing the connection between its exponent and the ratio between the population growth and the name production rates. |
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Keywords: | Branching process Galton Watson Renormalization group Family name distribution Power law Population |
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