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@ARTICLE{Steinigeweg:827476,
      author       = {Steinigeweg, R. and Jin, F. and Schmidtke, D. and De Raedt,
                      H. and Michielsen, K. and Gemmer, J.},
      title        = {{R}eal-time broadening of nonequilibrium density profiles
                      and the role of the specific initial-state realization},
      journal      = {Physical review / B},
      volume       = {95},
      number       = {3},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-01601},
      pages        = {035155},
      year         = {2017},
      abstract     = {The real-time broadening of density profiles starting from
                      nonequilibrium states is at the center of transport in
                      condensed-matter systems and dynamics in ultracold atomic
                      gases. Initial profiles close to equilibrium are expected to
                      evolve according to the linear response, e.g., as given by
                      the current correlator evaluated exactly at equilibrium.
                      Significantly off equilibrium, the linear response is
                      expected to break down and even a description in terms of
                      canonical ensembles is questionable. We unveil that single
                      pure states with density profiles of maximum amplitude yield
                      a broadening in perfect agreement with the linear response,
                      if the structure of these states involves randomness in
                      terms of decoherent off-diagonal density-matrix elements.
                      While these states allow for spin diffusion in the XXZ
                      spin-1/2 chain at large exchange anisotropies, coherences
                      yield entirely different behavior.},
      cin          = {JSC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511)},
      pid          = {G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000402171100001},
      doi          = {10.1103/PhysRevB.95.035155},
      url          = {https://juser.fz-juelich.de/record/827476},
}