SAMOP 2023 – scientific programme

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SYCC: Symposium From Molecular Spectroscopy to Collision Control at the Quantum Limit

SYCC 1: From Molecular Spectroscopy to Collision Control at the Quantum Limit

SYCC 1.3: Invited Talk

Thursday, March 9, 2023, 12:00–12:30, E415

Monitoring ultracold collisions with laser light — •Olivier Dulieu — Laboratoire Aime Cotton, CNRS, Paris-Saclay University, Orsay, France

Quantum gases of ultracold molecules are considered as an attractive platform for future developments in quantum information and quantum simulation. A full control of the molecules is a prerequisite for such applications, which is presently hindered in the ongoing experiments by loss processes assigned to the so-called sticky collisions. Happily, laser light offers opportunities for an exquisite monitoring of the interactions between molecules, to prevent them from colliding with each other. Based on the accurate knowledge of their spectrocopy, I will report on a novel proposal for a two-photon scheme which induces an effective optical shielding of interactions at large distances, while avoiding the heating of the molecular quantum gas by off-resonant photon scattering. I will argue about the advantages of this proposal with respect to previously proposed approaches like microwave shielding. This work is performed in collaboration with M. Meyer, L. Karpa, S. Ospelkaus at LHU, C. Karam, R. Vexiau, N. Bouloufa in Orsay, and M. Lepers (Dijon, F).