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@ARTICLE{Popkov:111858,
      author       = {Popkov, V. and Schütz, G.M.},
      title        = {{U}nusual shock wave in two-species driven systems with an
                      umbilic point},
      journal      = {Physical review / E},
      volume       = {86},
      number       = {3},
      issn         = {1539-3755},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-111858},
      pages        = {031139},
      year         = {2012},
      note         = {V.P. thanks the IZKS and the University of Bonn for
                      hospitality and acknowledges partial support by the
                      Alexander von Humboldt Foundation and from the italian MIUR
                      through PRIN 20083C8XFZ initiative.},
      abstract     = {Using dynamical Monte Carlo simulations we observe the
                      occurrence of an unexpected shock wave in driven diffusive
                      systems with two conserved species of particles. This U
                      shock is microscopically sharp, but does not satisfy the
                      usual criteria for the stability of shocks. Exact analysis
                      of the large-scale hydrodynamic equations of motion reveals
                      the presence of an umbilical point which we show to be
                      responsible for this phenomenon. We prove that such an
                      umbilical point is a general feature of multispecies driven
                      diffusive systems with reflection symmetry of the bulk
                      dynamics. We argue that a U shock will occur whenever there
                      are strong interactions between species such that the
                      current-density relation develops a double well and the
                      umbilical point becomes isolated.},
      keywords     = {J (WoSType)},
      cin          = {ICS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-2-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung},
      pid          = {G:(DE-Juel1)FUEK505},
      shelfmark    = {Physics, Fluids $\&$ Plasmas / Physics, Mathematical},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000309204400004},
      doi          = {10.1103/PhysRevE.86.031139},
      url          = {https://juser.fz-juelich.de/record/111858},
}