Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 24: Poster II

Q 24.44: Poster

Dienstag, 12. März 2024, 17:00–19:00, KG I Foyer

Rydberg quantum optics in ultracold Ytterbium gases — •Eduardo Uruñuela, Xin Wang, Thilina Muthu-arachchige, Tangi Legrand, Ludwig Müller, Wolfgang Alt, and Sebastian Hofferberth — Institute of Applied Physics, University of Bonn, Germany

Mapping the strong interaction between Rydberg excitations in ultracold atomic ensembles onto single photons paves the way to realize and control high optical nonlinearities at the level of single photons. Demonstrations of photon-photon gates or multi-photon bound states based on this concept have so far exclusively employed ultracold alkali atoms. Two-valence electron species, such as ytterbium, offer unique novel features such as narrow-linewidth laser-cooling, optical detection and ionization or long-lived nuclear-spin memory states.

In this poster, we present our experimental progress on the realization of strong interaction between photons, enabled by Yb-174 Rydberg polaritons formed in a 1-D ultracold Ytterbium gas. Owing to the zero nuclei spin of Yb-174 and singlet spin state in bivalent structure, the longer coherent time is expected. The singlet transition at 399 nm also helps us produce a long-focused dipole trap with higher OD in one dimension. Specifically, we discuss our implementation of ultracold Yb atoms in narrow-line MOT and elongated dipole trap with compact and fast-loading two-chamber experiment setup, and generation of the Rydberg polaritons under Rydberg electromagnetically induced transparency.

Keywords: Ultracold Ytterbium; Rydberg polariton; Electromagnetically induced transparency; Nonlinear Optics