Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)
Q 25.38: Poster
Dienstag, 11. März 2025, 14:00–16:00, Tent
Single-Atom Addressing in Optical Lattices Using UV Raman Transitions — •Francesco Testi1,4, Andreas von Haaren1,2, Robin Groth1,2, Luca Muscarella1,2, Janet Quesja1,2, Liyang Qiu1,2, Immanuel Bloch1,2, Timon Hilker1,3, Titus Franz1,2,4, and Philipp Preiss1,2 — 1Max Planck Institute of Quantum Optics, Garching — 2Munich Center for Quantum Science and Technology — 3University of Strathclyde, Glasgow — 4Ludwig Maximilian University of Munich
FermiQP is a demonstrator for a lattice-based fermionic quantum processor utilizing ultracold fermions in optical lattices. Operating in analog mode, the system facilitates precision studies of the two-dimensional Fermi-Hubbard model. In its digital mode, it implements a universal gate set on the spin degree of freedom, enabling advanced state engineering and local basis transformations. Combined with a rapid preparation cycle for degenerate Fermi gases, FermiQP opens new pathways for fermionic quantum information processing, with applications in quantum chemistry and strongly correlated materials.
We present a single-atom addressing scheme for coherently manipulating the internal states of individual Lithium-6 atoms within an optical lattice. The scheme employs two-photon Raman transitions at a UV wavelength of 323 nm, optimizing atomic coherence while minimizing cross-talk to neighboring atoms. We provide a comprehensive characterization of the 323 nm laser system and introduce an addressing system based on Acousto-Optic Deflectors capable of delivering up to six independently steerable beams in two dimensions.
Keywords: Degenerate Fermi gas; Optical Lattice; Raman adressing; Fermi-Hubbard model; Quantum Simulation