Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 23: Poster 2: Intersectional Session
Q 23.4: Poster
Dienstag, 15. März 2011, 18:00–21:00, P1
Scalable quantum computation via local control of only two qubits — •Daniel Burgarth1, Koji Maruyama2, Michael Murphy3, Simone Montangero3, Tommaso Calarco3, Franco Nori2, and Martin Plenio4 — 1IMS and QOLS, Imperial College, London, United Kingdom — 2Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Japan — 3Institut für Quanteninformationsverarbeitung, Universität Ulm — 4Institut für Theoretische Physik, Universität Ulm
Recent experiments on solid state qubits have focused on the implementation of high-fidelity operations on two qubits. It may seem that scaling these experiments to say 30 qubits requires a further big step in controlling the qubits. We show that this is not the case: the control implemented today is enough to indirectly control the remaining qubits, which can therefore remain passive. The control we have on the two qubits is mediated by the system Hamiltonian in a scalable way. This is shown by quantum control. In order to compute the required control pulses in a scalable fashion, we had to find a trick to separate the complexity of the dynamics (required for universal quantum computation) from its simulability (required for quantum control).