Bonn 2025 – wissenschaftliches Programm

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SYLC: Symposium Laser-cooled Molecules

SYLC 1: Laser-cooled Molecules

SYLC 1.3: Hauptvortrag

Freitag, 14. März 2025, 12:00–12:30, HS 1+2

Progress in quantum gases of polar molecules: Collisions, laser cooling, and trapping techniques — Mara Meyer zum Alten Borgloh, Jule Heier, Baraa Shammout, Fritz von Gierke, Timo Poll, Julius Niederstucke, Paul Kaebert, Sebastian Anskeit, Jakob Stalmann, Leon Karpa, Mirco Siercke, and •Silke Ospelkaus — Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany

In this talk, we will discuss recent progress in the study of quantum gases of polar molecules, focusing on two key areas: molecular collisions and laser cooling. First, we will present experiments with quantum gases of polar bosonic 23Na39K molecules, with an emphasis on inelastic atom-molecule and molecule-molecule collisions and the underlying mechanisms. Additionally, we will discuss the control of atom-molecule collisions using Feshbach resonances and prospects for shielding molecular collisions using optical photons at Raman resonance.

In the second part, we will cover recent advancements in the direct laser cooling of CaF molecules. Given the limitations of slowing methods, we will discuss efforts to increase the number of captured molecules, including experimental results on a Zeeman slower for directly laser-coolable molecules. Finally, we will discuss our approach toward realizing a sub-Doppler cooling magneto-optical trap.

Keywords: Ultracold molecules; Quantum gases