Magnetic control of ultra-cold ${}^6$Li and ${}^{174}$Yb(${}^3{P}_2$) atom mixtures with Feshbach resonances

Abstract

We theoretically evaluate the feasibility to form magnetically-tunable Feshbach molecules in collisions between fermionic ${}^6$Li atoms and bosonic metastable ${}^{174}$Yb(${}^3$P${}_2$) atoms. In contrast to the well-studied alkali-metal atom collisions, collisions with meta-stable atoms are highly anisotropic. Our first-principle coupled-channel calculation of these collisions reveals the existence of broad Feshbach resonances due to the combined effect of anisotropic-molecular and atomic-hyperfine interactions. In order to fit our predictions to the specific positions of experimentally-observed broad resonance structures \cite{Deep2015} we optimized the shape of the short-range potentials by direct least-square fitting. This allowed us to identify the dominant resonance by its leading angular momentum quantum numbers and describe the role of collisional anisotropy in the creation and broadening of this and other resonances.

6 pages, 5 figures

References in corpus (7)

• Many-Body Physics with Ultracold Gases
• A High Phase-Space-Density Gas of Polar Molecules
• Bose-Einstein Condensation of Erbium
• Controlling collisions of ultracold atoms with dc electric fields
• External field control of collective spin excitations in an optical lattice of ${}^2\Sigma$ molecules
• Controlling interactions between highly-magnetic atoms with Feshbach resonances
• Total control over ultracold interactions via electric and magnetic fields

Cited by in corpus (3)

• Magnetic field dependent interactions in an ultracold Li-Yb(${}^3$P${}_2$) mixture
• Collisional stability of localized Yb(${}^3{\mathrm{P}}_2$) atoms immersed in a Fermi sea of Li
• Spectroscopic determination of magnetic-field-dependent interactions in an ultracold Yb(3P2)-Li mixture