Couplings, attractiveness and hydrodynamics for conservative particle systems
Gobron, Thierry ; Saada, Ellen
Ann. Inst. H. Poincaré Probab. Statist., Tome 46 (2010) no. 1, p. 1132-1177 / Harvested from Project Euclid
Attractiveness is a fundamental tool to study interacting particle systems and the basic coupling construction is a usual route to prove this property, as for instance in simple exclusion. The derived Markovian coupled process (ξt, ζt)t≥0 satisfies: ¶ (A) if ξ0≤ζ0 (coordinate-wise), then for all t≥0, ξt≤ζt a.s. ¶ In this paper, we consider generalized misanthrope models which are conservative particle systems on ℤd such that, in each transition, k particles may jump from a site x to another site y, with k≥1. These models include simple exclusion for which k=1, but, beyond that value, the basic coupling construction is not possible and a more refined one is required. We give necessary and sufficient conditions on the rates to insure attractiveness; we construct a Markovian coupled process which both satisfies (A) and makes discrepancies between its two marginals non-increasing. We determine the extremal invariant and translation invariant probability measures under general irreducibility conditions. We apply our results to examples including a two-species asymmetric exclusion process with charge conservation (for which k≤2) which arises from a solid-on-solid interface dynamics, and a stick process (for which k is unbounded) in correspondence with a generalized discrete Hammersley–Aldous–Diaconis model. We derive the hydrodynamic limit of these two one-dimensional models.
Publié le : 2010-11-15
Classification:  Conservative particle systems,  Attractiveness,  Couplings,  Discrepancies,  Macroscopic stability,  Hydrodynamic limit,  Misanthrope process,  Discrete Hammersley–Aldous–Diaconis process,  Stick process,  Solid-on-solid interface dynamics,  Two-species exclusion model,  60K35,  82C22
@article{1288878341,
     author = {Gobron, Thierry and Saada, Ellen},
     title = {Couplings, attractiveness and hydrodynamics for conservative particle systems},
     journal = {Ann. Inst. H. Poincar\'e Probab. Statist.},
     volume = {46},
     number = {1},
     year = {2010},
     pages = { 1132-1177},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1288878341}
}
Gobron, Thierry; Saada, Ellen. Couplings, attractiveness and hydrodynamics for conservative particle systems. Ann. Inst. H. Poincaré Probab. Statist., Tome 46 (2010) no. 1, pp.  1132-1177. http://gdmltest.u-ga.fr/item/1288878341/