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Generalized Green Functions and Current Correlations in the TASEP

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Abstract

We study correlation functions of the totally asymmetric simple exclusion process (TASEP) in discrete time with backward sequential update. We prove a determinantal formula for the generalized Green function which describes transitions between positions of particles at different individual time moments. In particular, the generalized Green function defines a probability measure at staircase lines on the space-time plane. The marginals of this measure are the TASEP correlation functions in the space-time region not covered by the standard Green function approach. As an example, we calculate the current correlation function that is the joint probability distribution of times taken by selected particles to travel given distance. An asymptotic analysis shows that current fluctuations converge to the Airy2 process.

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Authors and Affiliations

  1. Bogolubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Moscow Region, Russia

    A. M. Povolotsky & V. B. Priezzhev

  2. Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, 52425, Jülich, Germany

    G. M. Schütz

  3. Interdisziplinäres Zentrum für Komplexe Systeme, Universität Bonn, Bonn, Germany

    G. M. Schütz

Authors
  1. A. M. Povolotsky
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  2. V. B. Priezzhev
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  3. G. M. Schütz
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Correspondence to A. M. Povolotsky.

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Povolotsky, A.M., Priezzhev, V.B. & Schütz, G.M. Generalized Green Functions and Current Correlations in the TASEP. J Stat Phys 142, 754–791 (2011). https://doi.org/10.1007/s10955-011-0133-y

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  • DOI: https://doi.org/10.1007/s10955-011-0133-y

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