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January 2011 Current fluctuations for TASEP: A proof of the Prähofer–Spohn conjecture
Gérard Ben Arous, Ivan Corwin
Ann. Probab. 39(1): 104-138 (January 2011). DOI: 10.1214/10-AOP550


We consider the family of two-sided Bernoulli initial conditions for TASEP which, as the left and right densities (ρ, ρ+) are varied, give rise to shock waves and rarefaction fans—the two phenomena which are typical to TASEP. We provide a proof of Conjecture 7.1 of [Progr. Probab. 51 (2002) 185–204] which characterizes the order of and scaling functions for the fluctuations of the height function of two-sided TASEP in terms of the two densities ρ, ρ+ and the speed y around which the height is observed.

In proving this theorem for TASEP, we also prove a fluctuation theorem for a class of corner growth processes with external sources, or equivalently for the last passage time in a directed last passage percolation model with two-sided boundary conditions: ρ and 1−ρ+. We provide a complete characterization of the order of and the scaling functions for the fluctuations of this model’s last passage time L(N, M) as a function of three parameters: the two boundary/source rates ρ and 1−ρ+, and the scaling ratio γ2=MN. The proof of this theorem draws on the results of [Comm. Math. Phys. 265 (2006) 1–44] and extensively on the work of [Ann. Probab. 33 (2005) 1643–1697] on finite rank perturbations of Wishart ensembles in random matrix theory.


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Gérard Ben Arous. Ivan Corwin. "Current fluctuations for TASEP: A proof of the Prähofer–Spohn conjecture." Ann. Probab. 39 (1) 104 - 138, January 2011.


Published: January 2011
First available in Project Euclid: 3 December 2010

zbMATH: 1208.82036
MathSciNet: MR2778798
Digital Object Identifier: 10.1214/10-AOP550

Primary: 60K35 , 82C22

Keywords: Asymmetric simple exclusion process , interacting particle systems , Last passage percolation

Rights: Copyright © 2011 Institute of Mathematical Statistics


Vol.39 • No. 1 • January 2011
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