SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster II

A 20.20: Poster

Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof

Towards fermionic weakly-bound open-shell RbSr molecules — •Digvijay Digvijay, Premjith Thekkeppatt, Simon Lepleux, Junyu He, Klaasjan van Druten, and Florian Schreck — Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam

Ultracold dipolar molecules are a promising platform for quantum simulation, precision measurement and quantum chemistry. Ultracold molecules produced so far are closed-shell molecules, which limits their range of applications. Our goal is to produce ultracold fermionic RbSr molecules, which are dipolar open-shell molecules, in order to extend the range of possibilities.

Here we present our progress along a novel approach to create these molecules. Our approach uses confinement induced resonances (CIR) in a strongly interacting Bose-Fermi mixture and overcomes the challenge that magnetic Feshbach resonances, which are typically used to create ultracold molecules, are extremely narrow between alkali and alkaline-earth atoms. CIRs couple an atom pair state in a tight trap to a very weakly bound molecule in an excited trap state. Adiabatically lowering the confinement transfers the atom pair into the molecular state. Our experiment will start by preparing a strongly interacting 87Rb-87Sr Bose-Fermi mixture. In order to suppress inelastic collisions we intend to first prepare an n=1 Mott insulator of Rb and then to overlap it with a spin polarized Fermi gas of Sr. After molecule creation by adiabatically ramping the lattice depth across a CIR, we plan to perform STIRAP to the molecular ground state.