Growth fluctuations in a class of deposition models

Details Growth fluctuations in a class of deposition models Growth fluctuations in a class of deposition models

2001-12-13

arxiv.org/abs/math/0112143v4

ALHP PR 39, 4 (2003) pp639-685

Mathematics

Probability

A minor mistake in lemma 5.1 is now corrected

Scientific paper

10.1016/S0246-0203(03)00019-0

We compute the growth fluctuations in equilibrium of a wide class of deposition models. These models also serve as general frame to several nearest-neighbor particle jump processes, e.g. the simple exclusion or the zero range process, where our result turns to current fluctuations of the particles. We use martingale technique and coupling methods to show that, rescaled by time, the variance of the growth as seen by a deterministic moving observer has the form |V-C|*D, where V and C is the speed of the observer and the second class particle, respectively, and D is a constant connected to the equilibrium distribution of the model. Our main result is a generalization of Ferrari and Fontes' result for simple exclusion process. Law of large numbers and central limit theorem are also proven. We need some properties of the motion of the second class particle, which are known for simple exclusion and are partly known for zero range processes, and which are proven here for a type of deposition models and also for a type of zero range processes.

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