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@ARTICLE{Hassler:279244,
      author       = {Hassler, Fabian and Catelani, Gianluigi and Bluhm, Hendrik},
      title        = {{E}xchange interaction of two spin qubits mediated by a
                      superconductor},
      journal      = {Physical review / B},
      volume       = {92},
      number       = {23},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2015-07259},
      pages        = {235401},
      year         = {2015},
      abstract     = {Entangling two quantum bits by letting them interact is the
                      crucial requirement for building a quantum processor. For
                      qubits based on the spin of the electron, these two qubit
                      gates are typically performed by exchange interaction of the
                      electrons captured in two nearby quantum dots. Since the
                      exchange interaction relies on tunneling of the electrons,
                      the range of interaction for conventional approaches is
                      severely limited as the tunneling amplitude decays
                      exponentially with the length of the tunneling barrier.
                      Here, we present an approach to couple two spin qubits via a
                      superconducting coupler. In essence, the superconducting
                      coupler provides a tunneling barrier for the electrons which
                      can be tuned with exquisite precision. We show that as a
                      result exchange couplings over a distance of several microns
                      become realistic, thus enabling flexible designs of
                      multiqubit systems.},
      cin          = {PGI-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-2-20110106},
      pnm          = {144 - Controlling Collective States (POF3-144)},
      pid          = {G:(DE-HGF)POF3-144},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000365774000006},
      doi          = {10.1103/PhysRevB.92.235401},
      url          = {https://juser.fz-juelich.de/record/279244},
}