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@ARTICLE{Mehl:154402,
      author       = {Mehl, Sebastian and Bluhm, Hendrik and DiVincenzo, David},
      title        = {{T}wo-qubit couplings of singlet-triplet qubits mediated by
                      one quantum state},
      journal      = {Physical review / B},
      volume       = {90},
      issn         = {0163-1829},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2014-03749},
      pages        = {045404},
      year         = {2014},
      abstract     = {We describe high-fidelity entangling gates between
                      singlet-triplet qubits (STQs) which are coupled via
                      onequantum state (QS). The QS can be provided by a quantum
                      dot itself or by another confined system. Theorbital
                      energies of the QS are tunable using an electric gate close
                      to the QS, which changes the interactionsbetween the STQs
                      independent of their single-qubit parameters. Short gating
                      sequences exist for controlled NOT(CNOT) operations. We show
                      that realistic quantum dot setups permit excellent
                      entangling operations with gateinfidelities below 10−3,
                      which is lower than the quantum error correction threshold
                      of the surface code. Weconsider limitations from fabrication
                      errors, hyperfine interactions, spin-orbit interactions, and
                      charge noise inGaAs and Si heterostructures.},
      cin          = {PGI-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-2-20110106},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000338738600014},
      doi          = {10.1103/PhysRevB.90.045404},
      url          = {https://juser.fz-juelich.de/record/154402},
}