Bonn 2025 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 18: Cold Molecules and Cold Chemistry (joint session MO/Q)
MO 18.3: Vortrag
Mittwoch, 12. März 2025, 15:15–15:30, HS XVI
Dual-color microwave-dressing for collisional control in molecular dipolar Fermi gases — •Sebastian Eppelt1,2, Shrestha Biswas1,2, Christine Frank1,2, Xing-Yan Chen4, Weikun Tian1,2, Immanuel Bloch1,2,3, and Xin-Yu Luo1,2 — 1Max-Planck-Institute of Quantum Optics — 2Munich Center for Quantum Science and Technology — 3Ludwig-Maximilans-Universität — 4Princeton University
Ultracold polar molecules are a promising platform for the exploration of exotic quantum matter, including topological dipolar p-wave superfluids, thanks to their long-range dipolar interactions. In this talk, we will present our work on microwave-dressing of fermionic 23Na40K molecules. Using a single, circularly-polarized, blue-detuned microwave field we can engineer intermolecular potential, where inelastic and elastic scattering tuneable via field-linked scattering resonance. This resonance is universal for systems with dipolar interactions and arises due to existence of a stable tetratomic bound state which we recently observed and characterized in our experiment. Adding a second, linearly polarized microwave field at a different frequency enables control of the long-range dipolar interaction by tuning the dipole-dipole scattering length. This improves our toolbox for creating ultracold, deeply-degenerate samples of dipolar fermionic molecules, necessary in our quest towards realizing a dipolar p-wave superfluid and beneficial for quantum simulations in optical lattices.
Keywords: Microwave shielding; Dipolar molecules; Superfluidity; Quantum Simulations; Ultracold Fermionic molecules