Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 3: Precision Spectrosocopy I - trapped ions (joint session A/Q)

A 3.5: Talk

Monday, March 5, 2018, 11:45–12:00, K 1.016

Coulomb Coupling of Single Ions in a 2D Trap Array — •Frederick Hakelberg, Philip Kiefer, Sebastian Schnell, Matthias Wittemer, Jan-Philip Schroeder, Ulrich Warring, and Tobias Schaetz — University of Freiburg, Germany

Trapped ions present a promising system for quantum simulations [1]. Surface-electrode traps in contrast to conventional ion traps offer the advantage of scalability to larger system size and dimension while maintaining individual control: Dedicated radio-frequency electrode shapes allow the creation of two-dimensional trap arrays [2] while control electrodes allow localized manipulation of the trapping potential tuning motional frequencies and mode orientations [3,4]. The coupling between the individual ions, seen as harmonic oscillators, can be mediated via the Coulomb interaction, as has been demonstrated for one-dimensional traps [5].
In our experiment we trap Mg⁺ ions in an equilateral triangle with 40 µm ion-ion distance. We present first experimental results for Coulomb coupling between ions in this two-dimensional trap array. Furthermore we investigate the effect of anharmonicities of the trapping potential on the exchange of large coherent states.

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

[2] R. Schmied et al., Phys. Rev. Lett. 102, 233002 (2009)

[3] M. Mielenz et al., Nature Communications 7, 11839 (2016)

[4] H. Kalis et al., Phys. Rev. A 94, 023401 (2016)

[5] Brown et al. & Harlander et al., Nature 471, 196-203 (2011)