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@INPROCEEDINGS{Willsch:838227,
      author       = {Willsch, Dennis and Nocon, Madita and Jin, Fengping and De
                      Raedt, Hans and Michielsen, Kristel},
      title        = {{S}imulation of gate-based quantum computers with
                      superconducting qubits},
      reportid     = {FZJ-2017-06889},
      year         = {2017},
      abstract     = {Over the last decades, tremendous effort has gone into
                      building a universal quantum computer. In theory, such a
                      device can solve certain problems such as factoring
                      exponentially faster than digital computers. The leading
                      technological prototypes are based on superconducting
                      circuits and comprise up to 17 qubits. Controlling these
                      fragile systems requires an enormous amount of precision,
                      posing a difficult challenge for the experimentalists. We
                      study such quantum systems in detail by solving the
                      time-dependent Schrödinger equation for a generic model
                      Hamiltonian. For this purpose, we have developed efficient
                      product-formula algorithms that are tailored to key features
                      of the model Hamiltonian. This allows us to simulate every
                      individual controlling pulse that is used in experiments to
                      realize a certain quantum gate, as dictated by the
                      computational model of a quantum computer. By optimizing the
                      pulse parameters, we find that even in the ideal case, the
                      best pulses still contain undesirable errors in the
                      realization of the intended quantum gate. The common gate
                      metrics measured and reported in experiments or computed in
                      theory are shown to provide insufficient practical
                      information about the significance of these errors.},
      month         = {Sep},
      date          = {2017-09-14},
      organization  = {Big ideas in quantum matter, Nijmegen
                       (The Netherlands), 14 Sep 2017 - 15 Sep
                       2017},
      subtyp        = {Other},
      cin          = {JSC},
      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)24},
      url          = {https://juser.fz-juelich.de/record/838227},
}