Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 23: Ultra-cold Atoms, Ions and BEC II (joint session A/Q)

Q 23.5: Vortrag

Dienstag, 11. März 2025, 12:15–12:30, KlHS Mathe

Quantum-gas microscopy of fermionic ⁸⁷Sr — Carlos Gas¹, Sandra Buob¹, Jonatan Höshele¹, •Antonio Rubio-Abadal¹, and Leticia Tarruell^1,2 — ¹ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain — ²ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain

Ultracold atoms in optical lattices are a popular platform in quantum science for studies in the fields of quantum simulation and quantum metrology. Alkaline-earth atoms like strontium offer many opportunities, such as a large-spin fermions with SU(N) symmetry as well as narrow or ultranarrow transitions.

In particular, ⁸⁷Sr presents a nuclear spin of I=9/2 (and no electronic spin) allowing the study of the SU(N)-Fermi-Hubbard model and quantum magnetism with N up to 10.

In recent experiments, we have demonstrated single-atom imaging of ⁸⁷Sr with spin resolution using the narrow linewidth 689 nm transition. Through a combination of Zeeman shifts and spin-resolved optical pumping we aim at a reliable detection of all 10 spin states.

Keywords: Quantum-gas microscopy; Strontium; Optical lattices; Fermi-Hubbard