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Random fractal strings: Their zeta functions, complex dimensions and spectral asymptotics

Authors: B. M. Hambly and Michel L. Lapidus
Journal: Trans. Amer. Math. Soc. 358 (2006), 285-314
MSC (2000): Primary 28A80, 60D05; Secondary 11M41, 58J50, 60J80
Published electronically: February 18, 2005
MathSciNet review: 2171234
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Abstract: In this paper a string is a sequence of positive non-increasing real numbers which sums to one. For our purposes a fractal string is a string formed from the lengths of removed sub-intervals created by a recursive decomposition of the unit interval. By using the so-called complex dimensions of the string, the poles of an associated zeta function, it is possible to obtain detailed information about the behaviour of the asymptotic properties of the string. We consider random versions of fractal strings. We show that by using a random recursive self-similar construction, it is possible to obtain similar results to those for deterministic self-similar strings. In the case of strings generated by the excursions of stable subordinators, we show that the complex dimensions can only lie on the real line. The results allow us to discuss the geometric and spectral asymptotics of one-dimensional domains with random fractal boundary.

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Additional Information

B. M. Hambly
Affiliation: Mathematical Institute, University of Oxford, 24-29 St Giles, Oxford OX1 3LB, United Kingdom

Michel L. Lapidus
Affiliation: Department of Mathematics, University of California, Riverside, California 92521-0135

Keywords: Random recursive fractal, general branching process, fractal string, zeta function, complex dimensions, stable subordinator, tubular neighbourhoods, spectral asymptotics
Received by editor(s): October 21, 2003
Received by editor(s) in revised form: February 17, 2004
Published electronically: February 18, 2005
Additional Notes: The second author was supported in part by the U.S. National Science Foundation under grants DMS-9623002, DMS-0070497.
Article copyright: © Copyright 2005 American Mathematical Society

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