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Phase Transitions for the Growth Rate of Linear Stochastic Evolutions

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Abstract

We consider a discrete-time stochastic growth model on d-dimensional lattice. The growth model describes various interesting examples such as oriented site/bond percolation, directed polymers in random environment, time discretizations of binary contact path process and the voter model. We study the phase transition for the growth rate of the “total number of particles” in this framework. The main results are roughly as follows: If d≥3 and the system is “not too random”, then, with positive probability, the growth rate of the total number of particles is of the same order as its expectation. If on the other hand, d=1,2, or the system is “random enough”, then the growth rate is slower than its expectation. We also discuss the above phase transition for the dual processes and its connection to the structure of invariant measures for the model with proper normalization.

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Authors and Affiliations

  1. Division of Mathematics, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan

    Nobuo Yoshida

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  1. Nobuo Yoshida
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Correspondence to Nobuo Yoshida.

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Supported in part by JSPS Grant-in-Aid for Scientific Research, Kiban (C) 17540112.

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Yoshida, N. Phase Transitions for the Growth Rate of Linear Stochastic Evolutions. J Stat Phys 133, 1033–1058 (2008). https://doi.org/10.1007/s10955-008-9646-4

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  • DOI: https://doi.org/10.1007/s10955-008-9646-4

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