The hyperfine energy levels of alkali metal dimers: ground-state homonuclear molecules in magnetic fields

Abstract

We investigate the hyperfine energy levels and Zeeman splittings for homonuclear alkali-metal dimers in low-lying rotational and vibrational states, which are important for experiments designed to produce quantum gases of deeply bound molecules. We carry out density-functional theory (DFT) calculations of the nuclear hyperfine coupling constants. For nonrotating states, the zero-field splittings are determined almost entirely by the scalar nuclear spin-spin coupling constant. By contrast with the heteronuclear case, the total nuclear spin remains a good quantum number in a magnetic field. We also investigate levels with rotational quantum number N = 1, which have long-range anisotropic quadrupole-quadrupole interactions and may be collisionally stable. For these states the splitting is dominated by nuclear quadrupole coupling for most of the alkali-metal dimers and the Zeeman splittings are considerably more complicated.

References in corpus (10)

• A High Phase-Space-Density Gas of Polar Molecules
• Formation of ultracold polar molecules in the rovibrational ground state
• Quantum Gas of Deeply Bound Ground State Molecules
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Ultracold dense gas of deeply bound heteronuclear molecules
• Optical pumping and vibrational cooling of molecules
• The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields
• Inelastic collisions of ultra-cold heteronuclear molecules in an optical trap
• Interactions and dynamics in Li + Li_2 ultracold collisions
• Cruising through molecular bound state manifolds with radio frequency

Cited by in corpus (27)

• The ExoMol database: molecular line lists for exoplanet and other hot atmospheres
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Quantum gas of rovibronic ground-state molecules in an optical lattice
• Quantum Magnetism with Polar Alkali Dimers
• Formation and interactions of cold and ultracold molecules: new challenges for interdisciplinary physics
• Controlling the scattering length of ultracold dipolar molecules
• Precision test of statistical dynamics with state-to-state ultracold chemistry
• Manipulating ultracold polar molecules with microwave radiation: the influence of hyperfine structure
• Cold collisions of N atoms and NH molecules in magnetic fields
• AC Stark Effect in Ultracold Polar RbCs Molecules
• Statistical product distributions for ultracold reactions in external fields
• High resolution photoassociation spectroscopy of the ${}^6$Li${}_2$ $1^3{\Sigma }_g^{+}$ state
• Deeply bound ultracold molecules in an optical lattice
• Hyperfine structure in the microwave spectra of ultracold polar molecules
• Collisional losses of ultracold molecules due to intermediate complex formation
• Model for the hyperfine structure of electronically-excited $\mathrm{KCs}$ molecules
• Hyperfine structure of 2Sigma molecules containing alkaline-earth atoms
• Precision molecular spectroscopy for ground state transfer of molecular quantum gases
• Phase gate and readout with an atom/molecule hybrid platform
• Photoassociation of a cold atom-molecule pair II: second order perturbation approach
• Detection of ultracold molecules using an optical cavity
• Fine Structure of Open Shell Diatomic Molecules in Combined Electric and Magnetic Fields
• Spinor Bose-Einstein Condensates of Rotating Polar Molecules
• Ultracold and dense samples of ground-state molecules in lattice potentials
• Ultracold coherent control of molecular collisions at a Förster resonance
• A model for nuclear spin product-state distributions of ultracold chemical reactions in magnetic fields