Connaughton, Colm and Harris, Jamie. (2010) Scaling properties of one-dimensional cluster-cluster aggregation with Lévy diffusion. Journal of Statistical Mechanics: Theory and Experiment, Vol.2010 (No.5). P05003 . ISSN 1742-5468

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Abstract

We present a study of the scaling properties of cluster-cluster aggregation with a source of monomers in the stationary state when the spatial transport of particles occurs by Levy flights. We show that the transition from mean-field statistics to fluctuation-dominated statistics which, for the more commonly considered case of diffusive transport, occurs as the spatial dimension of the system is tuned through two from above, can be mimicked even in one dimension by varying the characteristic exponent, beta, of the Levy jump length distribution. We also show that the two-point mass correlation function, responsible for the flux of mass in the stationary state, is strongly universal: its scaling exponent is given by the mean-field value independent of the spatial dimension and independent of the value of beta. Finally, we study numerically the two-point spatial correlation function which characterizes the structure of the depletion zone around heavy particles in the diffusion-limited regime. We find that this correlation function vanishes with a non-trivial fractional power of the separation between particles as this separation goes to zero. We provide a scaling argument for the value of this exponent which is in reasonable agreement with the numerical measurements.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics
Divisions:	Faculty of Science > Centre for Complexity Science Faculty of Science > Mathematics
Library of Congress Subject Headings (LCSH):	Lévy processes, Cluster analysis, Dynamics of a particle, Aggregation (Chemistry)
Journal or Publication Title:	Journal of Statistical Mechanics: Theory and Experiment
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	1742-5468
Date:	May 2010
Volume:	Vol.2010
Number:	No.5
Number of Pages:	19
Page Range:	P05003
Identification Number:	10.1088/1742-5468/2010/05/P05003
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Research Councils UK (RCUK), Engineering and Physical Sciences Research Council (EPSRC)
Related URLs:	Other Repository
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URI:	http://wrap.warwick.ac.uk/id/eprint/5819

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