Rovibrational Dynamics and Photoassociation of Cold Heteronuclear Dimers in Electric Fields

Philippe Pellegrini, L. Bomble, Mich `ele Desouter-Lecomte

Rosario González‐Férez

We investigate the effects of a static electric field on the rovibrational spectra of several alkali polar dimers in their electronic ground state, and on their formation via stimulated emission from ultracold ground state atoms.

Rosario González‐Férez, Matthias Weidemüller, Peter Schmelcher

The formation of heteronuclear molecules in their electronic ground states from a mixture of two ultracold atomic species via a one-photon stimulated emission process is investigated. The presence of an additional external homogeneous and static electric field is shown to severely influence the induced emission process. Using the LiCs molecule as a prototype, we study the corresponding cross section and its dependence on the continuum energy, final rovibrational state, and static electric field strength. The possibility of controlling the single-photon association process via an additional static electric field is demonstrated.

Marko Gacesa, Philippe Pellegrini, Robin C ot 'e

U. Schlöder, C. Silber, Claus Zimmermann

Debashree Chakraborty, Bimalendu Deb

We study non-perturbative effects of a static electric field on two-color photoassociation of different atoms. A static electric field induces anisotropy in scattering between two different atoms and hybridizes field-free rotational states of heteronuclear dimers or polar molecules. In a previous paper [D. Chakraborty et al., J. Phys. B 44, 095201 (2011)], the effects of a static electric field on one-color photoassociation between different atoms has been described through field-modified ground-state scattering states, neglecting electric field effects on heteronuclear diatomic bound states. To study the effects of a static electric field on heteronuclear bound states, and the resulting influence on Raman-type two-color photoassociation between different atoms in the presence of a static electric field, we develop a non-perturbative numerical method to calculate static electric field-dressed heteronuclear bound states. We show that the static electric field induced scattering anisotropy as well as hybridization of rotational states strongly influence two-color photoassociation spectra, leading to significant enhancement in PA rate and large shift. In particular, for static electric field strengths of a few hundred kV/cm, two-color PA rate involving high-lying bound states in electronic ground-state increases by several orders of magnitude even in the weak photoassociative coupling regime.