Empirical LiK excited state potentials: connecting short range and near dissociation expansions

Abstract

We report on a high-resolution spectroscopic survey of ${}^6\text{Li}{}^{40}\text{K}$ molecules near the $2\text{S}+4\text{P}$ dissociation threshold and produce a fully empirical representation for the ${\text{B}}^1\Pi$ potential by connecting available short- and long-range data. The purpose is to identify a suitable intermediate state for a coherent Raman transfer to the absolute ground state, and the creation of a molecular gas with dipolar interactions. Starting from weakly bound ultracold Feshbach molecules, the transition frequencies to twenty-six vibrational states are determined. Our data are combined with long-range measurements [Ridinger et al., EPL, 2011, 96, 33001], and near-dissociation expansions for the spin-orbit coupled potentials are fitted to extract the $C_6$ dispersion coefficients. A suitable vibrational level is identified by resolving its Zeeman structure and by comparing the experimentally attained g-factor to our theoretical prediction. Using mass-scaling of the short-range data for the ${\text{B}}^1\Pi$ [Pashov et al., Chem. Phys. Lett., 1998, 292, 615-620] and an updated value for its depth, we model the short- and the long-range data simultaneously and produce a Rydberg-Klein-Rees curve covering the entire range.

References in corpus (33)

• A High Phase-Space-Density Gas of Polar Molecules
• Search for New Physics with Atoms and Molecules
• Quantum computation with trapped polar molecules
• Cold and Ultracold Molecules: Science, Technology, and Applications
• A toolbox for lattice spin models with polar molecules
• Production of cold molecules via magnetically tunable Feshbach resonances
• Stimulated Raman adiabatic passage in physics, chemistry and beyond
• Condensed Matter Theory of Dipolar Quantum Gases
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Schemes for robust quantum computation with polar molecules
• An Optical Tweezer Array of Ultracold Molecules
• A Fermi Degenerate Gas of Polar Molecules
• Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
• Laser Cooling of Optically Trapped Molecules
• Dipolar Exchange Quantum Logic Gate with Polar Molecules
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Observation of magnetically tunable Feshbach resonances in ultracold ${}^{23}$Na${}^{40}$K+${}^{40}$K collisions
• Assembly of a rovibrational ground state molecule in an optical tweezer
• A Quantum Dipolar Spin Liquid
• A robust entangling gate for polar molecules using magnetic and microwave fields
• Improved LeRoy-Bernstein near-dissociation expansion formula. Tutorial application to photoassociation spectroscopy of long-range states
• Two-Photon Pathway to Ultracold Ground State Molecules of ${}^{23}$Na${}^{40}$K
• Photoassociative creation of ultracold heteronuclear 6Li40K* molecules
• Optical lattice clocks with weakly bound molecules
• Singlet Pathway to the Ground State of Ultracold Polar Molecules
• Two-Photon Spectroscopy of the NaLi Triplet Ground State
• Calibrating an interferometric laser frequency stabilization to MHz precision
• Long-range states of the NaRb molecule near the Na($3^2{S}_{1/2}$)+Rb($5^2{P}_{3/2}$) asymptote