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@ARTICLE{Tornberg:152159,
      author       = {Tornberg, L. and Barzanjeh, Sh. and DiVincenzo, David},
      title        = {{S}tochastic-master-equation analysis of optimized
                      three-qubit nondemolition parity measurements},
      journal      = {Physical review / A},
      volume       = {89},
      number       = {3},
      issn         = {1050-2947},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2014-01940},
      pages        = {032314},
      year         = {2014},
      abstract     = {We analyzea direct parity measurement of the state of three
                      superconducting qubits in circuit quantum electrodynamics.
                      The parity is inferred from a homodyne measurement of the
                      reflected and transmitted microwave radiation, and the
                      measurement is direct in the sense that the parity is
                      measured without the need for any quantum circuit operations
                      or for ancilla qubits. Qubits are coupled to two
                      resonant-cavity modes, allowing the steady state of the
                      emitted radiation to satisfy the necessary conditions to act
                      as a pointer state for the parity. However, the transient
                      dynamics violates these conditions, and we analyze this
                      detrimental effect and show that it can be overcome in the
                      limit of a weak measurement signal. Our analysis shows that,
                      with a moderate degree of postselection, it is possible to
                      achieve postmeasurement states with fidelity of order
                      $95\%.$ We believe that this type of measurement could serve
                      as a benchmark for future error correction protocols in a
                      scalable architecture},
      cin          = {PGI-2 / IAS-3 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-2-20110106 / I:(DE-Juel1)IAS-3-20090406 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000333179100003},
      doi          = {10.1103/PhysRevA.89.032314},
      url          = {https://juser.fz-juelich.de/record/152159},
}