Level 1 quenched large deviation principle for random walk in dynamic random environment

Details Level 1 quenched large deviation principle for random walk in dynamic random environment Level 1 quenched large deviation principle for random walk in dynamic random environment

2011-05-28

arxiv.org/abs/1105.5726v3

Mathematics

Probability

15 pages. This article is an update of a previous version which included only the first three authors and considered random wa

Scientific paper

Consider a random walk in a time-dependent random environment on the lattice Zd. Recently, Rassoul-Agha, Seppalainen and Yilmaz [RSY11] proved a general large deviation principle under mild ergodicity assumptions on the random environment for such a random walk, establishing ?rst level 2 and 3 large deviation principles. Here we present two alternative short proofs of the level 1 large deviations under mild ergodicity assumptions on the environment: one for the continuous time case and another one for the discrete time case. Both proofs provide the existence, continuity and convexity of the rate function. Our methods are based on the use of the sub-additive ergodic theorem as presented by Varadhan in 2003.

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