Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.5: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Control of the motional degrees of freedom in an ion surface trap array — •Matthias Wittemer, Manuel Mielenz, Henning Kalis, Frederick Hakelberg, Ulrich Warring, and Tobias Schaetz — Albert-Ludwigs-Universität Freiburg

Laser-cooled ions in (linear) Paul-traps have been proven to be well suited candidates for (1D) quantum simulations. Projecting the Paul-trap’s electrode structure onto a plane yields surface traps [1] that might be extended to large scale quantum simulators [2]. Advanced micro-fabrication techniques and geometrical optimization even allow the construction of 2-dimensional trap arrays [3].

We report on experiments within two triangular surface trap arrays, manufactured by Sandia National Labs, that offers 3 distinct trapping wells with a distance of 40 and 80 µm between the trapping centers, respectively. In order to perform adequate quantum simulations manipulation of the ion’s motional degrees of freedom is crucial. For individual real-time control of the trapping parameters via 30 control electrodes we therefore recently set up an arbitrary waveform generator based on the work of [4]. We employ analytical calculations as proposed by [5] to control the motional degrees of freedom of laser-cooled Mg+ ions in our trap, which is observed via Raman transitions.

[1] S. Seidelin et al., Phys. Rev. Lett. 96, 253003 (2006)

[2] Ch. Schneider et al., Rep. Prog. Phys. 75, 024401 (2012)

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

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

[5] J. H. Wesenberg, Phys. Rev. A 78, 063410 (2008)