Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster – Precision Spectroscopy of Atoms and Ions (joint session A/Q)

Q 27.18: Poster

Tuesday, March 3, 2026, 17:00–19:00, Philo 1. OG

Development of a YBCO-based step-up resonator for cryogenic Paul traps — •Hiroshi Hayakawa^{1, 2, 3}, Nadine Homburg^{1, 2, 3}, Elena Jordan⁵, Lukas Kau^{1, 2, 3}, and Peter Micke^{1, 2, 3, 4} — ¹Helmholtz Institute Jena — ²GSI Helmholtz Centre for Heavy Ion Research, Darmstadt — ³Friedrich Schiller University Jena — ⁴Abbe Center of Photonics, Jena — ⁵Physikalisch-Technische Bundesanstalt, Braunschweig

Step-up resonators are used to drive Paul traps at enhanced radio-frequency voltages; they additonally filter electrical noise and can reduce ion heating. Cryogenic setups typically offer improved passive temperature stability and thus result in inherently more stable trap drives. Despite these advantages, the permissible thermal load is limited and must be minimised. For these reasons, a high Q-factor becomes of paramount importance.

Exploiting the cryogenic environment, we are developing a step-up resonator based on the high-temperature superconductor YBCO. We aim at a high trap-drive frequency of up to 50 MHz for quantum logic spectroscopy with Be⁺ ions in the Lamb-Dicke regime. This demands an exceptionally high Q-factor to compensate for the high trap-drive frequency with a sufficiently large trap voltage for a given trap parameter q.

Keywords: Highly Charged Ion; Quantum Logic Spectroscopy; Optical Clocks; Paul Trap; Ion Trap