Electroassociation of Ultracold Dipolar Molecules into Tetramer Field-Linked States

The presence of electric or microwave fields can modify the long-range forces between ultracold dipolar molecules in such a way as to engineer weakly-bound states molecule pairs. These so-called field-linked [Avdeenkov et al., Phys. Rev. Lett. 90, 043006 (2003), Lassabli\`ere 121, 163402 (2018)], which separation two bound be orders magnitude larger than themselves, have been observed resonances scattering experiments [Chen Nature 614, 59 (2023)]. Here, we propose use them tools for assembly tetramer molecules, by means ramping an field, electric-field analog magneto-association atoms. This ability would present new possibilities constructing polyatomic molecules.