Hannover 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 40: Quantum Information: Quantum Computing
Q 40.8: Vortrag
Mittwoch, 10. März 2010, 18:15–18:30, F 128
Scalable quantum computation via local control of only two qubits — Daniel Burgarth1,2, Koji Maruyama2, •Michael Murphy3, Simone Montangero3, Tommaso Calarco3,4, Franco Nori2,5, and Martin B. Plenio1,6 — 1IMS and QOLS, Imperial College, London SW7 2PG, UK — 2Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan — 3Institut für Quanteninformationsverarbeitung, Universität Ulm, D-89069 Ulm, Germany — 4ECT*, 38050 Villazzano (TN), Italy — 5Physics Department, University of Michigan, Ann Arbor, Michigan, 48109, USA — 6Institut für Theoretische Physik, Universität Ulm, D-89069 Ulm, Germany
We apply quantum control techniques to control a large spin chain by only acting on two qubits at one of its ends, thereby implementing universal quantum computation by a combination of quantum gates on the latter and swap operations across the chain. It is shown that the control sequences can be computed and implemented efficiently. We discuss the application of these ideas to physical systems such as superconducting qubits in which full control of long chains is challenging.