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

Abstract

We investigate the energy levels of heteronuclear alkali metal dimers in levels correlating with the lowest rotational level of the ground electronic state, which are important in efforts to produce ground-state ultracold molecules. We use density-functional theory to calculate nuclear quadrupole and magnetic coupling constants for RbK and RbCs and explore the hyperfine structure in the presence of electric and magnetic fields. For nonrotating states, the zero-field splittings are dominated by the electron-mediated part of the nuclear spin-spin coupling. They are a few kHz for RbK isotopologs and a few tens of kHz for RbCs isotopologs.

8 pages, 6 figures

References in corpus (6)

• Observation of Bose-Einstein Condensation of Molecules
• Weakly bound dimers of fermionic atoms
• Coherent optical transfer of Feshbach molecules to a lower vibrational state
• Molecule formation in ultracold atomic gases
• Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
• `Stückelberg interferometry' with ultracold molecules

Cited by in corpus (41)

• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• New frontiers with quantum gases of polar molecules
• Ultracold polar molecules as qudits
• Topological phases in ultracold polar-molecule quantum magnets
• Quantum state manipulation and cooling of ultracold molecules
• Production of a dual-species Bose-Einstein condensate of Rb and Cs atoms
• Strong dependence of ultracold chemical rates on electric dipole moments
• Strongly interacting ultracold polar molecules
• State-to-state control of ultracold molecular reactions
• Controlling the Rotational and Hyperfine State of Ultracold ${}^{87}$Rb${}^{133}$Cs Molecules
• Adimensional theory of shielding in ultracold collisions of dipolar rotors
• Tuning ultracold collisions of excited rotational dipolar molecules
• Resonant dipolar collisions of ultracold molecules induced by microwave dressing
• Hyperfine structure of alkali-metal diatomic molecules
• Long-lived entanglement of molecules in magic-wavelength optical tweezers
• 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
• Controlling the ac Stark effect of RbCs with dc electric and magnetic fields
• Floquet Engineering Ultracold Polar Molecules to Simulate Topological Insulators
• Quantum Many-Body Physics with Ultracold Polar Molecules: Nanostructured Potential Barriers and Interactions
• Magic Conditions for Multiple Rotational States of Bialkali Molecules in Optical Lattices
• Collisional losses of ultracold molecules due to intermediate complex formation
• Coherent Manipulation of the Internal State of Ultracold ${}^{87}$Rb${}^{133}$Cs Molecules with Multiple Microwave Fields
• Diagonal and off-diagonal hyperfine structure matrix elements in KCs within the relativistic Fock space coupled cluster theory
• Robust nuclear spin entanglement via dipolar interactions in polar molecules
• Preparation of ${}^{87}$Rb and ${}^{133}$Cs in the motional ground state of a single optical tweezer
• SU(N) magnetism with ultracold molecules
• Shaping interactions between polar molecules with far-off-resonant light
• General classification of qubit encodings in ultracold diatomic molecules
• Long-lived multilevel coherences and spin-1 dynamics encoded in the rotational states of ultracold molecules
• Nondestructive dispersive imaging of rotationally excited ultracold molecules
• SU($N$) symmetry with ultracold alkali dimers: weak dependence of scattering properties on hyperfine state
• Ultracold molecular collisions in magnetic fields: Efficient incorporation of hyperfine structure in the total rotational angular momentum representation
• Ultracold Interactions between Ions and Polar Molecules
• Robust storage qubits in ultracold polar molecules
• Product-state distribution after isotopic substitution in ultracold atom-molecule collisions
• 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