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@ARTICLE{Klos:861559,
      author       = {Klos, Jan and Hassler, Fabian and Cerfontaine, Pascal and
                      Bluhm, Hendrik and Schreiber, Lars R.},
      title        = {{C}alculation of tunnel couplings in open gate-defined
                      disordered quantum dot systems},
      journal      = {Physical review / B},
      volume       = {98},
      number       = {15},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2019-02010},
      pages        = {155320},
      year         = {2018},
      abstract     = {Quantum computation based on semiconductor electron-spin
                      qubits requires high control of tunnel couplings between the
                      quantum dots and the electron reservoirs. Potential disorder
                      and the increasing complexity of the two-dimensional
                      gate-defined quantum computing devices set high demands on
                      the gate design and the voltage tuning of the tunnel
                      barriers. We present a Green's formalism approach for the
                      calculation of tunnel couplings between a quantum dot and a
                      reservoir. Our method takes into account in full detail the
                      two-dimensional electrostatic potential of the quantum dot,
                      the tunnel barrier, and the reservoir. A wideband limit is
                      employed only far away from the tunnel barrier region where
                      the density of states is sufficiently large. We calculate
                      the tunnel coupling including potential disorder effects,
                      which become increasingly important for large-scale
                      silicon-based spin-qubit devices. Studying the tunnel
                      couplings of a single-electron transistor in Si/SiGe as a
                      showcase, we find that charged defects are the dominant
                      source of disorder leading to variations in the tunnel
                      coupling of four orders of magnitude.},
      cin          = {PGI-11 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-11-20170113 / $I:(DE-82)080009_20140620$},
      pnm          = {144 - Controlling Collective States (POF3-144)},
      pid          = {G:(DE-HGF)POF3-144},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000448453400002},
      doi          = {10.1103/PhysRevB.98.155320},
      url          = {https://juser.fz-juelich.de/record/861559},
}