Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 26: Poster Session II
A 26.9: Poster
Mittwoch, 8. März 2017, 17:00–19:00, P OG1
Characterization and Control of Anharmonic Trapping Potentials in Surface-Electrode Ion Traps — •Frederick Hakelberg1, Philip Kiefer1, Leonard Nitzsche1, Henning Kalis1, Ulrich Warring1, and Tobias Schaetz1,2 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg — 2Freiburg Institute for Advanced Studies
Trapped ions present a promising system for quantum simulations [1]. However scaling the systems to larger size and dimension presents a major challenge. Surface-electrode traps offer a promising approach towards scalable ion traps [2, 3]. With decreasing length scales of trap electrodes and ion-electrode distances higher order terms of electric potentials become relevant. This includes contributions to the confining radio-frequency potential as well as to static control and stray potentials. Building on previous work [4] we present methods using motional excitation measurements to control higher order, anharmonic contributions and stray potentials. Furthermore we show how anharmonic radio-frequency potentials lead to a position dependent trace of the local curvature tensor that can be derived from established measurements of the motional frequencies. We present experimental results for both methods including the variation of anharmonic contributions using dedicated control potentials.
[1] Ch. Schneider et al., Rep. Prog. Phys. 75, 024401 (2012)
[2] T. Schaetz et al., New J. Phys. 15, 085009 (2013)
[3] M. Mielenz et al., Nature Communications 7, 11839 (2016)
[4] H. Kalis et al., Phys. Rev. A 94, 023401 (2016)