SAMOP 2021 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 11: Quantum Information (joint session QI/Q)

Q 11.23: Poster

Mittwoch, 22. September 2021, 16:30–18:30, P

Engineering of Vibrational dynamics in a two-dimensional array of trapped ions — •Deviprasath Palani, Philip Kiefer, Lennart Guth, Florian Haße, Robin Thomm, Ulrich Warring, and Tobias Schaetz — Physikalisches Institut, University of 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 by tuning motional frequencies and mode orientations [3]. Our setup consists of an 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 1D arrangements. We demonstrate its tuning in real-time and show interference of large coherent states [4] and employ modulation of the local trapping potentials to realize phonon-assisted tunneling between adjacent sites [5]. Furthermore, with an identical prototype setup, we investigate methods such as surface cleaning to decrease noise field contributions [6].

[1] K. R. Brown et al., Nature 471 (2011). [2] T. Schaetz et al., N. J. Phys. 15, 085009 (2013). [3] M.Mielenz et al., Nat. Com. 7, 11839 (2016). [4] Hakelberg, F. et al. Phys. Rev. Lett. 123, 100504 (2019). [5] Kiefer, P. et al. Phys. Rev. Lett. 123, 213605 (2019). [6] U. Warring et al., Adv. Quantum Technol. 2020, 1900137.