Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Information (Quantum Computing) II
Q 33.3: Vortrag
Mittwoch, 13. März 2019, 14:45–15:00, S HS 001 Chemie
Entangling gate in a surface-electrode Paul trap with microwave near-fields — •Giorgio Zarantonello1,2, Henning Hahn1,2, Marius Schulte3, Amado Bautista-Salvador2,1, Klemens Hammerer3, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2PTB, Bundesallee 100, 38116 Braunschweig — 3Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover
Surface-electrode ion traps are a scalable platform for quantum information processing based on the quantum charge-coupled device (QCCD) architecture [1-2]. A large-scale device would offer different traps, interconnected through transport, used e. g. for loading, storage, single- and multi-qubit operations. Here, the implementation of gate operations with near-field microwaves [3] can be advantageous because the gate drive mechanism can be an integral, scalable part of the device. We present an approach where tailored microwave conductors have been embedded into a surface-electrode trap, allowing the realization of an entangling multi-qubit gate with a fidelity exceeding 98%. We discuss the gate error budget and ongoing efforts to further increase the fidelity.
[1] D.J. Wineland et al., J. Res. NIST. 103, 259-328 (1998)
[2] D. Kielpinski et al., Nature 417, 709-711 (2002)
[3] C. Ospelkaus et al., Nature 476, 181 (2011).