Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster – Ultracold Matter (joint session Q/A)
Q 42.15: Poster
Mittwoch, 4. März 2026, 17:00–19:00, Philo 2. OG
Programmable State Preparation of Ultracold Fermions Using Optical Tweezer Arrays — •Francesco Testi1,2, Marcus Culemann1, Jin Zhang1, Naman Jain1, and Philipp Preiss1,3 — 1Max Planck Institute of Quantum Optics, Garching — 2Ludwig-Maximilians-Universität München — 3Munich Center for Quantum Science and Technology, Munich, Germany
Ultracold atoms in optical lattices offer a powerful platform for studying interacting quantum many-body systems and non-equilibrium dynamics. However, the preparation of arbitrary initial states remains a major challenge, as conventional cooling and loading protocols naturally yield only a limited set of configurations such as Mott insulators or charge-density waves. The UniRand experiment aims to overcome this limitation by integrating an optical lattice with an array of dynamically reconfigurable optical tweezers for the preparation of programmable site- and spin-resolved arrangements of fermionic lithium-6 atoms. The poster showcases high-fidelity spin-resolved imaging, efficient loading and evaporation within the tweezer array, and deterministic control over the atomic density in each individual trap. These capabilities allow us to assemble arbitrary spin and density configurations across an 8x8 array with a rapid experimental cycle time of 2-3 s. By combining precise state preparation with fast repetition rates, this programmable-state architecture opens new opportunities for realizing fermionic quantum information protocols and engineering tailored non-equilibrium states to explore previously inaccessible regimes of the Fermi-Hubbard model.
Keywords: Quantum Simulation; Ultracold Fermions; Quantum Gas Microscope; Tweezer Arrays; Optical lattice