Lattice gases with a point source

@article{Krapivsky2014LatticeGW,
  title={Lattice gases with a point source},
  author={Paul L. Krapivsky and Darko Stefanovic},
  journal={arXiv: Statistical Mechanics},
  year={2014}
}
We study diffusive lattice gases with local injection of particles, namely we assume that whenever the origin becomes empty, a new particle is immediately injected into the origin. We consider two lattice gases: a symmetric simple exclusion process and random walkers. The interplay between the injection events and the positions of the particles already present implies an effective collective interaction even for the ostensibly non-interacting random walkers. We determine the average total… 
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