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@ARTICLE{Cundy:722,
      author       = {Cundy, N. and Krieg, S. and Lippert, T. and Schäfer, A.},
      title        = {{T}opological tunnelling with dynamical overlap fermions},
      journal      = {Computer physics communications},
      volume       = {180},
      issn         = {0010-4655},
      address      = {Amsterdam},
      publisher    = {North Holland Publ. Co.},
      reportid     = {PreJuSER-722},
      pages        = {201 - 208},
      year         = {2009},
      note         = {Calculations were performed on the JUBL and Cray XD-1
                      computers at The Julich Supercomputing Center (JSC), at the
                      Forschentrum Julich, Germany. N.C. is grateful for the
                      support of grant 930183 from the EU RP-6 "Hadron Physics"
                      project, from the DFG "Gitter-Hadronen Phanomenologie"
                      project, number 458/14-4 and EU grant
                      MC-EIF-CT-2004-506078.},
      abstract     = {Tunnelling between different topological sectors with
                      dynamical chiral fermions is difficult because of a poor
                      mass scaling of the pseudo-fermion estimate of the
                      determinant. For small fermion masses it is virtually
                      impossible using standard methods. However, by projecting
                      out the small Wilson eigenvectors from the overlap operator.
                      and treating the correction determinant exactly, we can
                      significantly increase the rate of topological sector
                      tunnelling and reduce substantially the auto-correlation
                      time. We present and compare a number of different
                      approaches, and advocate a method which allows topological
                      tunnelling even at low mass with little addition to the
                      computational cost. (C) 2008 Elsevier B.V. All rights
                      reserved.},
      keywords     = {J (WoSType)},
      cin          = {JSC / JARA-HPC},
      ddc          = {004},
      cid          = {I:(DE-Juel1)JSC-20090406 / $I:(DE-82)080012_20140620$},
      pnm          = {Scientific Computing},
      pid          = {G:(DE-Juel1)FUEK411},
      shelfmark    = {Computer Science, Interdisciplinary Applications / Physics,
                      Mathematical},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000263448600006},
      doi          = {10.1016/j.cpc.2008.09.010},
      url          = {https://juser.fz-juelich.de/record/722},
}