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PushTASEP in inhomogeneous space. (English) Zbl 1453.82058
Summary: We consider the PushTASEP (pushing totally asymmetric simple exclusion process, also sometimes called long-range TASEP) with the step initial configuration evolving in an inhomogeneous space. That is, the rate of each particle’s jump depends on the location of this particle. We match the distribution of the height function of this PushTASEP with Schur processes. Using this matching and determinantal structure of Schur processes, we obtain limit shape and fluctuation results which are typical for stochastic particle systems in the Kardar-Parisi-Zhang universality class. PushTASEP is a close relative of the usual TASEP. In inhomogeneous space the former is integrable, while the integrability of the latter is not known.

MSC:
82C22 Interacting particle systems in time-dependent statistical mechanics
60C05 Combinatorial probability
35Q82 PDEs in connection with statistical mechanics
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