Freiburg 2019 – scientific programme

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FM: Fall Meeting

FM 40: Poster: Quantum Computation: Hardware Platforms

FM 40.2: Poster

Tuesday, September 24, 2019, 16:30–18:30, Tents

Individually controlled Ion Trap Arrays for Quantum Simulations — •Deviprasath Palani, Frederick Hakelberg, Philip Kiefer, Lennart Guth, Jan-Philipp Schröder, Matthias Wittemer, Ulrich Warring, and Tobias Schaetz — Uni Freiburg

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].
Our setup consists of a basic but scalable array of three Mg⁺ ions individually trapped in an equilateral triangle with 40 µm inter-site distance. We present the first realization of inter-site coupling, until now only realized for one-dimensional arrangements [4]. We demonstrate its tuning in real time, and show interference of large coherent states [5]. Furthermore we employ the individual control for modulation of the local trapping potentials to realize phonon-assisted tunnelling between adjacent sites [6].

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

[5] F. Hakelberg et al., arXiv:1812.08552, 196-203 (2018)

[6] A. Bermudez et al., Phys. Rev. Lett. 107, 150501 (2011)