Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 24: Poster II
Q 24.38: Poster
Tuesday, March 12, 2024, 17:00–19:00, KG I Foyer
Cooperative effects in dense cold atomic gases including magnetic dipole interactions — •Nico Baßler1,2, Ishan Varma3, Marvin Proske3, Patrick Windpassinger3, Kai Phillip Schmidt1, and Claudiu Genes2,1 — 1Department of Physics, Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), D-91058 Erlangen, Germany — 2Max Planck Institute for the Science of Light, D-91058 Erlangen, Germany — 3Institut für Physik, Johannes Gutenberg-Universität Mainz, 55122 Mainz, Germany
We theoretically investigate cooperative effects in cold atomic gases exhibiting both electric and magnetic dipole-dipole interactions, such as occurring for example in clouds of dysprosium atoms. We distinguish between the quantum degenerate case, where we take a many-body physics approach, and the quantum non-degenerate case, where we use the formalism of open system dynamics. For quantum non-degenerate gases, we illustrate the emergence of tailorable spin models in the high-excitation limit. In the low-excitation limit, we provide analytical and numerical results detailing the effect of magnetic interactions on the directionality of scattered light and characterize sub- and superradiant effects. For quantum degenerate gases, we study the interplay between sub- and superradiance effects and the fermionic or bosonic quantum statistics nature of the ensemble.
Keywords: Cold gas; Light scattering; Dysprosium; Magnetic; Interactions