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@INPROCEEDINGS{Michielsen:845099,
      author       = {Michielsen, Kristel},
      title        = {{S}imulations on/of various types of quantum computers},
      reportid     = {FZJ-2018-02418},
      year         = {2018},
      abstract     = {A quantum computer (QC) is a device that performs
                      operations according to the rules of quantum theory. There
                      are various types of QCs of which nowadays the two most
                      important ones considered for practical realization are the
                      gate-based QC and the quantum annealer (QA). Practical
                      realizations of gate-based QCs consist of less than 100
                      qubits while QAs with more than 2000 qubits are commercially
                      available.In the gate model QC, a universal QC, a
                      computation (or quantum algorithm) consists of a sequence of
                      quantum gate operations (unitary transformations) that
                      changes the internal state of the QC. Quantum annealing is a
                      technique for finding the global minimum of a quadratic
                      function of binary variables by exploiting quantum
                      fluctuations. Its main potential targets are combinatorial
                      optimization problems featuring a discrete search space with
                      many local minima.We present results of simulating on the
                      IBM Quantum Experience devices and on the D-Wave 2X QA with
                      more than 1000 qubits. Simulations of both types of QCs are
                      performed by first modeling them as zero-temperature quantum
                      systems of interacting spin-1/2 particles and then emulating
                      their dynamics by solving the time-dependent Schrödinger
                      equation. Our software allows for the simulation of a
                      48-qubit gate-based QC on the Sunway TaihuLight
                      supercomputer.We also briefly report about EQUIPE, a user
                      group, established by Forschungszentrum Jülich, to Enable
                      QUantum Information Processing in Europe and about JUNIQ, a
                      Jülich User Infrastructure for Research and Development in
                      Quantum Computing, offering European users from science and
                      industry user support and access to various QC simulators
                      and eventually technologies on various stages of maturity
                      (D-Wave QA, multi-qubit devices for QC without error
                      correction from e.g. IBM, Google, Rigetti Computing, …,
                      and experimental devices).},
      month         = {Mar},
      date          = {2018-03-29},
      organization  = {41th ORAP Forum “Quantum
                       Computing”, Paris (France), 29 Mar
                       2018 - 29 Mar 2018},
      subtyp        = {Invited},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511)},
      pid          = {G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/845099},
}