Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics II
Q 31.2: Poster
Dienstag, 24. März 2015, 17:00–19:00, C/Foyer
Microwave near-field quantum logic techniques for a cryogenic surface-electrode trap — •Sebastian Grondkowski1, Martina Wahnschaffe1,2, Matthias Kohnen1,2, Timko Dubielzig1, Henning Hahn1, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2Physikalisch-Technische-Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
We describe the necessary control infrastructure for experiments with integrated microwave near-field surface-electrode ion traps at cryogenic temperatures with applications in quantum simulation and quantum logic. A trap geometry recently developed in our group [1] implements the coupling between the ions’ motional and internal state using only a single meander-shaped microwave-conductor. The realization of high-fidelity quantum-logic-operations requires a static bias magnetic field at 22.3 mT to generate a field-independend 9Be+ hyperfine-qubit, microwave control fields for single-qubit rotations and sideband transitions, dc voltages for trapping fields together with fast DAC-modules to control a pulse-shaping stage and reconfigurable rf trapping potentials. We present the current status of the experiment at room temperature and give an outlook for a future setup at cryogenic temperatures to suppress to effect of anomalous heating due to the small distance between the ions and the trap surface of about 30 µ m [2,3].
[1] M. Carsjens et al., Appl. Phys. B 114, 243-250 (2014)
[2] Deslauriers et al., Phys. Rev. Lett. 97, 103007 (2006)
[3] Labaziewicz et al., Phys. Rev. Lett. 100, 013001 (2008)