Passage-time moments and hybrid zones for the exclusion-voter model
| Autor: | MacPhee, Iain M., Menshikov, Mikhail V., Volkov, Stanislav, Wade, Andrew R. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Bernoulli 2010, Vol. 16, No. 4, 1312-1342 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3150/09-BEJ243 |
| Popis: | We study the non-equilibrium dynamics of a one-dimensional interacting particle system that is a mixture of the voter model and the exclusion process. With the process started from a finite perturbation of the ground state Heaviside configuration consisting of 1's to the left of the origin and 0's elsewhere, we study the relaxation time $\tau$, that is, the first hitting time of the ground state configuration (up to translation). We give conditions for $\tau$ to be finite and for certain moments of $\tau$ to be finite or infinite, and prove a result that approaches a conjecture of Belitsky et al. (Bernoulli 7 (2001) 119--144). Ours are the first non-existence-of-moments results for $\tau$ for the mixture model. Moreover, we give almost sure asymptotics for the evolution of the size of the hybrid (disordered) region. Most of our results pertain to the discrete-time setting, but several transfer to continuous-time. As well as the mixture process, some of our results also cover pure exclusion. We state several significant open problems. Comment: Published in at http://dx.doi.org/10.3150/09-BEJ243 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm) |
| Databáze: | arXiv |
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