Christian Bartsch, Nina Gantert, Michael Kochler
Published 2009-06-22, updated 2009-12-01Version 2
We consider a particular Branching Random Walk in Random Environment (BRWRE) on $\sN_0$ started with one particle at the origin. Particles reproduce according to an offspring distribution (which depends on the location) and move either one step to the right (with a probability in $(0,1]$ which also depends on the location) or stay in the same place. We give criteria for local and global survival and show that global survival is equivalent to exponential growth of the moments. Further, on the event of survival the number of particles grows almost surely exponentially fast with the same growth rate as the moments.
Comments: Revised version, improved results. Accepted at Markov Processes and Related Fields
Moment asymptotics for branching random walks in random environment
Limit theorems for the minimal position of a branching random walk in random environment
On the trajectory of an individual chosen according to supercritical Gibbs measure in the branching random walk
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