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@ARTICLE{ParradoRodrguez:893417,
      author       = {Parrado-Rodríguez, Pedro and Ryan-Anderson, Ciarán and
                      Bermudez, Alejandro and Müller, Markus},
      title        = {{C}rosstalk {S}uppression for {F}ault-tolerant {Q}uantum
                      {E}rror {C}orrection with {T}rapped {I}ons},
      journal      = {Quantum},
      volume       = {5},
      issn         = {2521-327X},
      address      = {Wien},
      publisher    = {Verein zur Förderung des Open Access Publizierens in den
                      Quantenwissenschaften},
      reportid     = {FZJ-2021-02741},
      pages        = {487 -},
      year         = {2021},
      abstract     = {Physical qubits in experimental quantum information
                      processors are inevitably exposed to different sources of
                      noise and imperfections, which lead to errors that typically
                      accumulate hindering our ability to perform long
                      computations reliably. Progress towards scalable and robust
                      quantum computation relies on exploiting quantum error
                      correction (QEC) to actively battle these undesired effects.
                      In this work, we present a comprehensive study of crosstalk
                      errors in a quantum-computing architecture based on a single
                      string of ions confined by a radio-frequency trap, and
                      manipulated by individually-addressed laser beams. This type
                      of errors affects spectator qubits that, ideally, should
                      remain unaltered during the application of single- and
                      two-qubit quantum gates addressed at a different set of
                      active qubits. We microscopically model crosstalk errors
                      from first principles and present a detailed study showing
                      the importance of using a coherent vs incoherent error
                      modelling and, moreover, discuss strategies to actively
                      suppress this crosstalk at the gate level. Finally, we study
                      the impact of residual crosstalk errors on the performance
                      of fault-tolerant QEC numerically, identifying the
                      experimental target values that need to be achieved in
                      near-term trapped-ion experiments to reach the break-even
                      point for beneficial QEC with low-distance topological
                      codes.},
      cin          = {PGI-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-2-20110106},
      pnm          = {5224 - Quantum Networking (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5224},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000669889400001},
      doi          = {10.22331/q-2021-06-29-487},
      url          = {https://juser.fz-juelich.de/record/893417},
}