Orateur
Description
We explore the possibility of electro-association of two ultracold dipolar molecules into a long-range tetramer state, called a "field linked state". These particular states have been predicted in 2003 [1] in a static electric field and more recently in a microwave [2]. Such states have been confirmed by a recent experiment [3] in the resonances of ultracold molecular scattering.
We discuss the experimental feasibility of the process in terms of the adequate electric field ramp of a microwave to apply, different decay lifetimes, and in terms of the initial population starting with either thermal or quantum degenerate gases. The process shares a lot in common with magneto-association for which one can associate two ultracold atoms into a long-range diatomic molecule using a ramp of magnetic field [4]. This can be a primary step to form ground-state tetramers [5].
[1] A. V. Avdeenkov and J. L. Bohn, "Linking Ultracold Polar Molecules", Phys. Rev. Lett. 90, 043006 (2003)
[2] L. Lassablière and G. Quéméner, "Controlling the Scattering Length of Ultracold Dipolar Molecules", Phys. Rev. Lett. 121, 163402 (2018)
[3] Chen et al., "Field-linked resonances of polar molecules", Nature 614, 59 (2023)
[4] T. Köhler, K. Góral, and P. S. Julienne, "Production of cold molecules via magnetically tunable Feshbach resonances", Rev. Mod. Phys. 78, 1311 (2006) ; C. Chin, R. Grimm, P. Julienne, and E. Tiesinga, "Feshbach resonances in ultracold gases", Rev. Mod. Phys. 82, 1225 (2010)
[5] N. V. Vitanov, A. A. Rangelov, B. W. Shore, and K. Bergmann, "Stimulated Raman adiabatic passage in physics, chemistry, and beyond", Rev. Mod. Phys. 89, 015006 (2017)
| Affiliation de l'auteur principal | Laboratoire Aimé Cotton, CNRS, Université Paris-Saclay |
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