Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 12: Ultra-cold atoms, ions and BEC (with A)

Q 12.39: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Fast and high-fidelity motional control of trapped ions — •Matthias Wittemer, Govinda Clos, Frederick Hakelberg, Henning Kalis, Manuel Mielenz, Ulrich Warring, and Tobias Schaetz — Physikalisches Institut, Albert-Ludwigs-Universität, Hermann-Herder-Straße 3, 79104 Freiburg, Germany

Laser-cooled ions, trapped in radio-frequency potentials, are promising candidates for experimental quantum simulations [1]. In addition to the precise manipulation of the electronic states (pseudo spin), control of the motional states of the trapped ions is crucial for adequate quantum simulations.

We report on experiments with Mg+ ions in a (conventional) linear Paul trap and a surface-electrode trap with three distinct trapping sites, arranged in an equilateral triangle. The implementation of an arbitrary waveform generator [2] into the experimental setups enables real-time control of the motional degrees of freedom within a few microseconds. This may allow precise studies of tunable spin-spin interactions [3] and phenomena like thermalization [4] or squeezed-state emergence [5] in isolated quantum systems.

[1] T. Schaetz et al., New J. Phys. 15, 085009 (2013)

[2] R. Bowler et al., Rev. Sci. Instrum. 84, 033108 (2013)

[3] A.C. Wilson et al., Nature 512, 57-60 (2014)

[4] G. Clos et al., arXiv:1509.07712 (2015)

[5] R. Schützhold et al., Phys. Rev. Lett. 99, 201301 (2007)