Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 25: Poster IV

A 25.2: Poster

Mittwoch, 13. März 2024, 17:00–19:00, Tent A

High Fidelity transport of trapped-ion qubits in a multilayer array — •Deviprasath Palani, Florian Hasse, Apurba Das, Leon Goepfert, Ole Pikkemaat, Ulrich Warring, and Tobias Schaetz — Physikalisches Institut, Universitaet Freiburg, Freiburg, Germany

Trapped ion arrays, facilitated by Radio-Frequency surface electrode traps, offer a promising platform for extending analog quantum simulations in size and dimension. Our prototype, fabricated by Sandia National Laboratories, creates a three-dimensional potential landscape housing 13 strongly confined ion storage sites alongside intermittently weakly confined areas featuring transport channels. An equilateral triangular array, situated closer to the surface with a side length of 40 µm, enables local site control, 2D inter-site coupling, and Floquet-engineering coupling via motional degrees of freedom[1-3]. Extending these methods, we enable deterministic ion redistribution using an ancilla site approximately 13 µm above the array. Ramsey spectroscopy confirms the preservation of electronic degree-of-freedom information during ion transport. Our current focus lies in addressing noise predominantly arising from surface contaminants using argon-ion bombardment and tackling other technical limitations[5].

[1] Mielenz, M. et al. Nat. Commun. 7, 11839 (2016). [2] Hakelberg, F. et al. Phys. Rev. Lett. 123, 100504 (2019). [3] Kiefer, P. et al. Phys. Rev. Lett. 123, 213605 (2019). [4] Palani, D. et al. Phys. Rev. A. 107, L050601 (2023). [5] Warring, U. et al. Adv. Quantum Technol. 1900137 (2020).

Keywords: Trapped-ion array; Ion transport; Surface electrode trap; Argon-ion bombardment; Ramsey spectroscopy