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@INPROCEEDINGS{Winkelmann:835038,
      author       = {Winkelmann, Jan and Di Napoli, Edoardo and Schleife,
                      Andre`},
      title        = {{O}ptimizing the {C}h{ASE} eigensolver for
                      {B}ethe-{S}alpeter computations},
      reportid     = {FZJ-2017-04908},
      year         = {2017},
      abstract     = {The Chebyshev Accelerated Subspace iteration Eigensolver
                      (ChASE) is an iterative eigensolver developed at the JSC by
                      the SimLab Quantum Materials. The solver mainly targets
                      sequences of dense eigenvalue problems as they arise in
                      Density Functional Theory, but can also work on the single
                      eigenproblem. ChASE leverages on the predominant use of BLAS
                      3 subroutines to achieve close-to-peak performance and
                      potentially achieve scalability over hundreds if not
                      thousands of computing nodes. We have recently succeeded to
                      integrate a version of the ChASE library within the Jena BSE
                      code. Preliminary comparison between ChASE and the conjugate
                      gradient eigensolver (KSCG), previously used by the Jena BSE
                      code, shows that ChASE can outperform KSCG with speedups up
                      to 5X. In this talk we illustrate our latest results and
                      give an outlook of the scientific problems that can be
                      tackled once the integration is successfully completed.},
      month         = {Jul},
      date          = {2017-07-17},
      organization  = {Joint Laboratory for Extreme-Scale
                       Computing Workshop, Urbana-Champaign
                       (USA), 17 Jul 2017 - 19 Jul 2017},
      subtyp        = {Invited},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511) / Simulation and Data Laboratory Quantum
                      Materials (SDLQM) (SDLQM)},
      pid          = {G:(DE-HGF)POF3-511 / G:(DE-Juel1)SDLQM},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/835038},
}