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Random Parking, Euclidean Functionals, and Rubber Elasticity

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Abstract

We study subadditive functions of the random parking model previously analyzed by the second author. In particular, we consider local functions S of subsets of \({\mathbb{R}^d}\) and of point sets that are (almost) subadditive in their first variable. Denoting by ξ the random parking measure in \({\mathbb{R}^d}\), and by ξR the random parking measure in the cube Q R =  (−R, R)d, we show, under some natural assumptions on S, that there exists a constant \({\overline{S} \in \mathbb{R}}\) such that

$$\lim_{R \to +\infty} \frac{S(Q_R, \xi)}{|Q_R|} \, = \, \lim_{R \to +\infty} \frac{S(Q_R, \xi^{R})}{|Q_R|} \, = \, \overline{S}$$

almost surely. If \({\zeta \mapsto S(Q_R, \zeta)}\) is the counting measure of \({\zeta}\) in Q R , then we retrieve the result by the second author on the existence of the jamming limit. The present work generalizes this result to a wide class of (almost) subadditive functions. In particular, classical Euclidean optimization problems as well as the discrete model for rubber previously studied by Alicandro, Cicalese, and the first author enter this class of functions. In the case of rubber elasticity, this yields an approximation result for the continuous energy density associated with the discrete model at the thermodynamic limit, as well as a generalization to stochastic networks generated on bounded sets.

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Correspondence to Mathew D. Penrose.

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Communicated by M. Aizenman

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Gloria, A., Penrose, M.D. Random Parking, Euclidean Functionals, and Rubber Elasticity. Commun. Math. Phys. 321, 1–31 (2013). https://doi.org/10.1007/s00220-013-1725-y

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