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 64.14: Poster
Donnerstag, 5. März 2026, 17:00–19:00, Philo 1. OG
Fast single atom spin and number resolved imaging of SU(N) fermions — •Leon Schäfer1,2, Sophie Häfele1,2, Thies Plassmann1,2, Meny Menashes1,2, and Guillaume Salomon1,2 — 1Institute for Quantum Physics, Hamburg University, Luruper Chaussee 149, 22761 Hamburg — 2The Hamburg Center for Ultrafast Imaging, Hamburg University, Luruper Chaussee 149, 22761 Hamburg
Large local Hilbert spaces are of key interest in quantum science with applications in quantum-computing, -memories, and -simulation of strongly-correlated systems. Multilevel quantum systems such as superconducting circuits, trapped ions, cold molecules and ultracold atoms offer the possibility to realize qudits. Yet, the simultaneous control and detection of multiple quantum states at the single-particle and state level remain a significant challenge. State-of-the-art quantum simulators with single particle and spin detection, such as quantum gas microscopes, also suffer from limited state selectivity and long detection times. We present a rapid imaging technique enabling the simultaneous detection of up to four quantum states encoded in the nuclear spin manifold of 87Sr within 100 µ s. By combining an optical Stern-Gerlach separation protocol with high-fidelity ultrafast imaging in free space we achieve state-resolved detection fidelities in the range of 95 - 99.3%. This method is compatible with the joint detection of multiple atoms initially confined within the same optical trap. Our technique offers fascinating perspectives for quantum science with alkaline-earth atoms ranging from qudit based quantum computing to quantum gas microscopy of the SU(N) Fermi-Hubbard model.
Keywords: Strontium; Quantum Simulations; Optical Lattice; Fermions; Single atom