Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 47: Cold Molecules and Cold Chemistry (joint session MO/Q)
Q 47.5: Vortrag
Mittwoch, 12. März 2025, 15:45–16:00, HS XVI
Delta-Kick Collimation of Heteronuclear Feshbach Molecules — •Timothé Estrampes1,2, Jose P. D’Incao3,4, Jason. R. Williams5, Éric Charron2, and Naceur Gaaloul1 — 1Leibniz University Hannover, Institut für Quantenoptik, Germany — 2Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, France — 3JILA, NIST, and the Department of Physics,University of Colorado, Boulder, CO 80309, USA — 4Department of Physics, University of Massachusetts Boston, Boston, MA 02125, USA — 5Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
Delta-Kick Collimation [Phys. Rev. Lett. 78, 2088 (1997)] is a well-known process in atomic physics that allows to drastically reduce the expansion energy of a cold sample by flashing an external potential during its release. Here, we theoretically explore the extension of this process to cold heteronuclear Feshbach molecules.
We first investigate the validity of neglecting the coupling between the center-of-mass motion and molecular vibrations. After establishing the domain of validity for this approximation, we use scaling approaches to estimate the achievable gains over a large range of temperature and density regimes. For typical external trap paramaters, the expansion energy of a thermal cloud could be reduced by a factor of 100, increasing to over 500 for a heteronuclear condensed molecule.
Keywords: Dipolar Bose-Einstein Condensates; Feshbach Molecules; Heteronuclear Molecules; Collimation; Scaling approach