The Hydrodynamical Behavior of the Coupled Branching Process
Greven, Andreas
Ann. Probab., Tome 12 (1984) no. 4, p. 760-767 / Harvested from Project Euclid
The coupled branching process $(\eta^\mu_t)$ is a Markov process on $(\mathbb{N})^S (S = \mathbb{Z}^d)$ with initial distribution $\mu$ and the following time evolution: At rate $b\eta(x)$ a particle is born at site $x$, which moves instantaneously to a site $y$ chosen with probability $q(x, y)$. All particles at a site die at rate $pd$, individual particles die independent from each other at rate $(1 - p)d$. Furthermore, all particles perform independent continuous time random walks with kernel $p(x, y)$. We consider here the case $b = d$ and the symmetrized kernels $\hat p, \hat q$ are transient. We show that the measures $\mathscr{L}(\eta^\mu_t(\cdot + \lbrack\alpha \sqrt{tx}\rbrack)), (\alpha \in \mathbb{R}^+, x \in \mathbb{R}^d)$ converge weakly for $t \rightarrow \infty$ to $\nu_{\tau(a,x)}$. Here $\nu_\rho$ is the invariant measure of the process with: $E^{\nu_\rho}(\eta(x)) = \rho$ and which is also extremal in the set of all translationinvariant invariant measures of the process. The density profile $\tau(\alpha, x)$ is calculated explicitly; it is governed by the diffusion equation.
Publié le : 1984-08-14
Classification:  Infinite particle systems,  hydrodynamical limit,  60K35,  82A05
@article{1176993226,
     author = {Greven, Andreas},
     title = {The Hydrodynamical Behavior of the Coupled Branching Process},
     journal = {Ann. Probab.},
     volume = {12},
     number = {4},
     year = {1984},
     pages = { 760-767},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1176993226}
}
Greven, Andreas. The Hydrodynamical Behavior of the Coupled Branching Process. Ann. Probab., Tome 12 (1984) no. 4, pp.  760-767. http://gdmltest.u-ga.fr/item/1176993226/