Mainz 2026 – scientific programme
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A: Fachverband Atomphysik
A 36: Poster – Ultra-cold Atoms, Ions and BEC (joint session A/Q)
A 36.13: Poster
Thursday, March 5, 2026, 17:00–19:00, Philo 1. OG
A Cryogenic Surface Trap for experiments with Rydberg ions — •Vinay Shankar1, Marion Mallweger1, Simon Schey1,2, Natalia Kuk1, Ivo Straka1, Robin Thomm1, and Markus Hennrich1 — 1Department of Physics, Stockholm University, Stockholm, Sweden — 2Infineon Technologies Austria AG, Villach, Austria
Trapped Rydberg ions are a unique platform for quantum information processing, metrology and simulations [1,2] as they combine the exceptional control over trapped ions with the tunable, long-range interactions of Rydberg states. Rydberg ions have been used to demonstrate sub-microsecond entangling gates [3]. One of the biggest challenges while working with Rydberg ions is double ionisation due to blackbody radiation, since Rydberg states are close to the ionisation threshold. The operation of the system in a cryogenic environment would reduce this effect significantly, and here we present such an experimental system. The setup hosts a surface ion trap, with separate trapping and experimental zones. Here we present the first measurements with the surface trap with the goal of showcasing Rydberg excitations on such a system. The large polarisability of Rydberg ions makes them highly sensitive to surrounding electric fields and can be utilised as a precise probe for sensing electric fields around the chip.
[1] M. Müller, et al., NJP, 10, 093009 (2008).
[2] F. Schmidt-Kaler, et al., NJP, 13, 075014 (2011).
[3] C. Zhang, et. al., Nature 580, 345 (2020)
Keywords: Trapped ions; Rydberg; Quantum sensing