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@INPROCEEDINGS{DiVincenzo:884098,
      author       = {DiVincenzo, David},
      title        = {{C}urrent {C}hallenges for {Q}uantum {C}omputing},
      school       = {University Norwegian of Science and Technology},
      reportid     = {FZJ-2020-03093},
      year         = {2020},
      abstract     = {We have known for over twenty years that quantum computers
                      would have unique powers for solving certain classes of
                      computational problems. Throughout these twenty years,
                      workers have striven to identify a physical setting in which
                      high-quality qubits can be created and employed in a quantum
                      computing system. Very promising devices have been
                      identified in several different areas of low-temperature
                      electronics, namely in superconductor and in single-electron
                      semiconductor structures (e.g., quantum dots).Rudimentary
                      efforts at scale-up are presently underway; even for modules
                      of 10 qubits, the complexity of the classical electronic
                      control system becomes one of the main barriers to further
                      progress. The specifications of this control system are now
                      well defined, and are daunting. In this talk I will touch on
                      two aspects of this control problem. First, I indicate the
                      problems with unintended couplings between qubits in
                      multi-qubit structures. For superconducting qubit systems, I
                      show our current methodology for accurately characterizing
                      these couplings. Second, I suggest solutions to the problem
                      of miniaturizing the microwave circulator, using the quantum
                      Hall effect; current circulators take up so much space in
                      existing experiments that they limit the physical scale-up
                      of the systems.},
      organization  = {Physics Colloquium, (Norway)},
      subtyp        = {Invited},
      cin          = {PGI-2},
      cid          = {I:(DE-Juel1)PGI-2-20110106},
      pnm          = {144 - Controlling Collective States (POF3-144)},
      pid          = {G:(DE-HGF)POF3-144},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/884098},
}