Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 21: Poster – Atomic Systems in External Fields
A 21.4: Poster
Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG
Mechanical squeezed Kerr oscillator based on a tapered ion trap — Bogomila Nikolova1, Moritz Gob2, Kilian Singer2, and •Peter Ivanov1 — 1Sofia University, Bulgaria — 2University of Kassel, Germany
We propose a theoretical description of a mechanically squeezed Kerr oscillator with a single ion in a tapered trap. We show that the motion coupling between the axial and radial modes caused by the trap geometry leads to Kerr nonlinearity of the radial mode with magnitude controlled by the trap frequencies. This allows the realization of non-Gaussian quantum gates, which play a significant role in the universal set of continuous variable quantum gates. Furthermore, we show that, because of the nonlinearity of the ion trap, applying an off-resonant time-varying electric field along the trap axis causes a motion squeezing of the radial mode. Finally, we discuss the motion mode frequency spectrum of an ion crystal in a tapered trap. We show that the frequency gap between the motion modes increases with trap nonlinearity, which benefits the realization of faster quantum gates.
Keywords: Trapped ions; Kerr nonlineaity; Quantum metrology; Quantum gates; Motional squeezing