Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster – Ultra-cold Atoms, Ions and BEC (joint session A/Q)

Q 27.22: Poster

Tuesday, March 11, 2025, 14:00–16:00, Tent

Stroboscopic Measurement Techniques to Observe Cyclic Dynamics Showcased in a Trapped-Ion Quantum Simulator — •Florian Hasse, Frederike Doerr, Andreas Weber, Deviprasath Palani, Apurba Das, Tobias Spanke, Ulrich Warring, and Tobias Schaetz — Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany

The study of dynamical processes in trapped-ion systems provides insights into the fundamentals of quantum mechanics. Such studies uniquely combine theory, experiment, and technological innovation, enabling a deeper understanding of the dynamics of physical systems.

Introducing an approach, creating and maintaining the coherence of four oscillators: a global microwave reference field, a polarization-gradient traveling-wave pattern of light, and a single trapped ion’s spin and motional states. Utilized to stroboscopically trace dynamical variations in position and momentum observables of a coherently displaced state with noise floors of 1.8(2) nm and 8(2) zµNs, respectively [1].

This stroboscopic measurement technique offers the observation of motional states with minimal disturbance. Additionally, this method could benefit the generation of multi-particle entangled states, facilitating the transfer of spatial entanglement in multimode squeezed states into the robust electronic degrees of freedom of multiple ions. By improving the switching times of our acousto-optic modulator setup, we aim to expand the applicability of these techniques and explore analogs of early-universe physics.

[1] F. Hasse et al., Phys. Rev. A 109, 053105 (2024)

Keywords: Super-Resolution of Trapped-Ion Dynamics; Phase-Stable Combination of Control Fields; Polarization-Gradient Traveling-Wave Pattern; Stroboscopic Measurement Technique; Dynamics of Cyclic States