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Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.32: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
Radiofrequency Spectroscopy of a single 40Ca+ Qubit — •Jens Welzel, Amado Bautista-Salvador, Niels Kurz, Rene Gerritsma, and Ferdinand Schmidt-Kaler — QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
Miniaturized ion traps may offer a route towards scalable quantum computation and simulation. Such devices also allow the manipulation of ions via magnetic field gradients in the radiofrequency domain, thus avoiding the technological overhead of lasers [1]. Here, we report on experimental work on a planar ion trap designed to coherently manipulate 40Ca+ ions via magnetic field gradients [2]. We performed radiofrequency spectroscopy [1] of a single 40Ca+ ion in the presence of static currents. Additionally, by moving the ion 600 µm along the trap axis we measured the total static magnetic field which yields a gradient of 1.11±0.18 T/m per Ampere along the trap axis. Oscillating currents may be employed to couple the spin of the ions to their motion. We anticipate gradients of 10 T/m per Ampere perpendicular to the trap axis. These fields may be used to engineer spin-spin interactions in an ion crystal [2]. The presented experiments also pave the way for the implementation of a laser-less sideband cooling and robust quantum gates based on oscillating magnetic field gradients in the radiofrequency regime.
[1] Johanning, M. et. al. Phys. Rev. Lett. 102, 073004 (2009).
[2] Welzel, J. et. al. Eur. Phys. J. D 65, 285−297 (2011).