SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 22: Poster II
Q 22.66: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Stability of quantum degenerate fermionic polar molecules with and without microwave shielding — •Antun Balaž1 and Axel Pelster2 — 1Center for the Study of Complex Systems, Institute of Physics Belgrade, University of Belgrade, Serbia — 2Department of Physics, Technical University of Kaiserslautern, Germany
A stabilization of a fermionic molecular gas towards collapse in attractive head-to-tail collisions and its evaporative cooling below the Fermi temperature has so far been achieved in two ways. Either a strong dc electric field is applied to confine the molecular motion to 2D [1] or inelastic collisions in 3D are strongly suppressed by applying a circularly polarized microwave field [2]. Here we use a Hartree-Fock mean-field theory [3,4] in order to determine the 3D properties of quantum degenerate fermionic molecules. In particular, we compare the stability diagrams occurring with and without microwave shielding, where a dipole-dipole interaction with negative and positive sign is present. In case when the orientation of the electric dipoles with respect to the trap axes is unknown, we outline how to reconstruct it from time-of-flight absorption measurements.
[1] G. Valtolina et al., Nature 588, 239 (2020).
[2] A. Schindewolf et al., Nature 607, 677 (2022).
[3] V. Veljić et al., New J. Phys. 20, 093016 (2018).
[4] V. Veljić et al., Phys. Rev. Research 1, 012009(R) (2019).