Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster – Ultra-cold atoms, ions and BEC (joint session A/Q)

Q 64.41: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 1. OG

A New-Generation Rydberg Atom Quantum Simulator — •Lukas Klein, Bastien Gély, Mu Qiao, Romain Martin, Thierry Lahaye, and Antoine Browaeys — University Paris-Saclay, Institut Optique Graduate School

We are building a new-generation Rydberg atom array setup for quantum simulations that will replace the existing setup developed at Institut d’Optique over the last decade. With this platform, single atoms are arranged in arbitrary geometries by optical tweezers. Using Rydberg states, it is then possible to implement many-body spin Hamiltonians [1]. Most recent works include the XY spin model [2] and the t-J spin model [3].

I will present the construction of the new-generation setup, that improves several important features of the machine. One major upgrade are the focusing optics, which used to be aspheric lenses on the old setup and are now high NA (0.57) microscope objectives. We are therefore able to generate larger arrays of single Rb-87 atoms.

I will further present some experimental results demonstrating our control over the atoms, such as state preparation and manipulation in ground and Rydberg states. Furthermore, we refined the technique of grey molasses used for cooling and enhanced loading - reaching filling fractions of more than 85%.

References

[1] A. Browaeys and T. Lahaye, Nature Physics 16, 132 (2020).

[2] G. Emperauger et al., Phys. Rev. X 15, 031021 (2025).

[3] M. Qiao et al., Nature 644, 889-895 (2025).

Keywords: Quantum Simulation; Rydberg; Optical Tweezers; Cold Atoms