Hannover 2020 – scientific programme

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A: Fachverband Atomphysik

A 28: Poster Session - Atomic Physics IV

A 28.2: Poster

Thursday, March 12, 2020, 16:00–18:00, Empore Lichthof

Engineering of vibrational dynamics in a two-dimensional array of trapped ions — •Deviprasath Palaini, Matthias Wittemer, Frederick Hakelberg, Florian Haße, Philip Kiefer, Ulrich Warring, and Tobias Schaetz — Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, Hermann-Herder-Strasse 3, 79104 Freiburg

Trapped ions present a promising system for quantum simulations. 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 arrays of individual micro traps, while control electrodes allow localised manipulation of the trapping potential tuning motional frequencies and mode orientations. Our setup consists of a basic but scalable array of three Mg⁺ ions individually trapped in an equilateral triangle with 40µm inter-site distance. We present the first realisation of inter-site coupling, until now only realised for linear arrangements. We demonstrate its tuning in real time, and show interference of large coherent states [1]. Furthermore we employ the individual control for modulation of the local trapping potentials to realise phonon-assisted tunnelling between adjacent sites [2].
[1] Hakelberg, F. et al. Phys. Rev. Lett. 123, 100504 (2019)
[2] Kiefer, P. et al. Phys. Rev. Lett. 123, 213605 (2019)