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@ARTICLE{Gsken:860307,
      author       = {Güsken, Stephan and Lippert, Thomas and Schilling, Klaus},
      title        = {{L}attice {QCD} with two dynamical {W}ilson fermions on
                      {APE}100 parallel systems},
      journal      = {Parallel computing},
      volume       = {25},
      number       = {10-11},
      issn         = {0167-8191},
      address      = {Amsterdam [u.a.]},
      publisher    = {North-Holland, Elsevier Science},
      reportid     = {FZJ-2019-01082},
      pages        = {1227 - 1242},
      year         = {1999},
      abstract     = {The cost for stochastic sampling of quantum chromodynamics
                      (QCD) vacuum configurations outweighs by far the costs of
                      the remaining computational tasks in Lattice QCD, due to the
                      non-local forces arising from the dynamics of fermion loops
                      in the vacuum fluctuations. The evaluation of quality and
                      hence efficiency of sampling algorithms is largely
                      determined by the assessment of their decorrelation capacity
                      along the Monte Carlo time series. In order to gain control
                      over statistical errors, state-of-the-art research and
                      development on QCD sampling algorithms need substantial
                      amount of teraflops-hours. Over the past years two
                      German–Italian collaborations, SESAM and TχL, carried out
                      exploratory simulations, joining their resources in a
                      meta-computing effort on various computer platforms in Italy
                      and Germany. In this article, we shall discuss the practical
                      aspects of this work, present highlights of autocorrelation
                      measurements, illustrate the impact of unquenching on some
                      fundamental parameters of QCD and describe the lessons to be
                      learned for future, more realistic computer experiments of
                      this kind.},
      ddc          = {620},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/S0167-8191(99)00048-4},
      url          = {https://juser.fz-juelich.de/record/860307},
}