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Exceedingly Large Deviations of the Totally Asymmetric Exclusion Process (1708.07052v3)

Published 23 Aug 2017 in math.PR

Abstract: Consider the Totally Asymmetric Simple Exclusion Process (TASEP) on the integer lattice $ \mathbb{Z} $. We study the functional Large Deviations of the integrated current $ \mathsf{h}(t,x) $ under the hyperbolic scaling of space and time by $ N $, i.e., $ \mathsf{h}_N(t,\xi) := \frac{1}{N}\mathsf{h}(Nt,N\xi) $. As hinted by the asymmetry in the upper- and lower-tail large deviations of the exponential Last Passage Percolation, the TASEP exhibits two types of deviations. One type of deviations occur with probability $ \exp(-O(N)) $, referred to as speed-$ N $; while the other with probability $ \exp(-O(N{2})) $, referred to as speed-$ N2 $. In this work we study the speed-$ N2 $ functional LDP of the TASEP, and establishes (non-matching) large deviation upper and lower bounds.

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