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@ARTICLE{Pasini:20143,
      author       = {Pasini, S. and Uhrig, G.S.},
      title        = {{S}ymmetry-enhanced performance of dynamical decoupling},
      journal      = {Physical review / A},
      volume       = {84},
      number       = {4},
      issn         = {1050-2947},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-20143},
      pages        = {042336},
      year         = {2011},
      note         = {We would like to thank Gregory Quiroz and Daniel A. Lidar
                      for helpful discussions. The financial support by the grant
                      UH 90/5-1 of the DFG is gratefully acknowledged.},
      abstract     = {We consider a system with general decoherence and a
                      quadratic dynamical decoupling sequence (QDD) for the
                      coherence control of a qubit coupled to a bath of spins. We
                      investigate the influence of the geometry and of the initial
                      conditions of the bath on the performance of the sequence.
                      The overall performance is quantified by a distance norm d.
                      It is expected that d scales with tau, the total duration of
                      the sequence, as tau(min{Nx, Nz}+1), where N-x and N-z are
                      the number of pulses of the outer and of the inner sequence,
                      respectively. We show both numerically and analytically that
                      the state of the bath can boost the performance of QDD under
                      certain conditions: The scaling of QDD for a given number of
                      pulses can be enhanced by a factor of 2 if the bath is
                      prepared in a highly symmetric state and if the system
                      Hamiltonian is SU(2) invariant.},
      keywords     = {J (WoSType)},
      cin          = {ICS-1 / ESS / JCNS-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)VDB361 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      shelfmark    = {Optics / Physics, Atomic, Molecular $\&$ Chemical},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000296283900003},
      doi          = {10.1103/PhysRevA.84.042336},
      url          = {https://juser.fz-juelich.de/record/20143},
}