Ab initio calculation of the KRb dipole moments

Abstract

The relativistic configuration interaction valence bond method has been used to calculate permanent and transition electric dipole moments of the KRb heteronuclear molecule as a function of internuclear separation. The permanent dipole moment of the ground state $X^1{\Sigma }^{+}$ potential is found to be 0.30(2) $e{a}_0$ at the equilibrium internuclear separation with excess negative charge on the potassium atom. For the $a^3{\Sigma }^{+}$ potential the dipole moment is an order of magnitude smaller (1 $e{a}_0=8.4783510^{-30}$ Cm) In addition, we calculate transition dipole moments between the two ground-state and excited-state potentials that dissociate to the K(4s)+Rb(5p) limits. Using this data we propose a way to produce singlet $X^1{\Sigma }^{+}$ KRb molecules by a two-photon Raman process starting from an ultracold mixture of doubly spin-polarized ground state K and Rb atoms. This Raman process is only allowed due to relativistic spin-orbit couplings and the absence of gerade/ungerade selection rules in heteronuclear dimers.

arXiv comment16 pages, 7 figures

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• Bose-Einstein condensation with magnetic dipole-dipole forces
• Trapped atomic condensates with anisotropic interactions
• Creation of a molecular condensate by dynamically melting a Mott-insulator
• High-precision calculations of van der Waals coefficients for heteronuclear alkali-metal dimers
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Cited by in corpus (38)

• A High Phase-Space-Density Gas of Polar Molecules
• The physics of dipolar bosonic quantum gases
• Optical Production of Ultracold Polar Molecules
• Calculation of accurate permanent dipole moments of the lowest ${}^{1,3}{\Sigma }^{+}$ states of heteronuclear alkali dimers using extended basis sets
• Ultracold dense gas of deeply bound heteronuclear molecules
• Photoassociative Production and Trapping of Ultracold KRb Molecules
• Production of Ultracold, Polar RbCs* Molecules via Photoassociation
• Production and state-selective detection of ultracold, ground state RbCs molecules
• Magneto-Optical Trap for Polar Molecules
• Stability of quasi-two-dimensional Bose-Einstein condensates with dominant dipole-dipole interactions
• Quantum phases of a Two-Dimensional Dipolar Fermi Gas
• The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields
• Heteronuclear molecules in an optical dipole trap
• The coupling of the X${}^1{\Sigma }^{+}$ and a${}^3{\Sigma }^{+}$ states of KRb
• Suppression of inelastic collisions of polar ${}^1\Sigma$ state molecules in an electrostatic field
• Controlling Polar Molecules in Optical Lattices
• Dispersion interactions and reactive collisions of ultracold polar molecules
• Accurate near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy
• Piecewise adiabatic population transfer in a molecule via a wave packet
• Measurement of the variation of electron-to-proton mass ratio using ultracold molecules produced from laser-cooled atoms
• Collective and single-particle excitations in 2D dipolar Bose gases
• Chemical reactions of ultracold alkali-metal dimers in the lowest-energy ${}^3\Sigma$ state
• KRb Feshbach Resonances: Modeling the interatomic potential
• Dipole Polarizability of Alkali-Metal (Na, K, Rb) - Alkaline-Earth-Metal (Ca,Sr) Polar molecules - Prospects of Alignment
• Precision measurements with polar molecules: the role of the black body radiation
• Diatomic molecules of alkali-metal and alkaline-earth-metal atoms: interaction potentials, dipole moments, and polarizabilities
• Accurate potential energy, dipole moment curves, and lifetimes of vibrational states of heteronuclear alkali dimers
• Product state control of bi-alkali chemical reactions
• Molecular ion trap-depletion spectroscopy of BaCl${}^{+}$
• State-Selective Detection of Near-Dissociation Ultracold KRb $X^1{\Sigma }^{+}$ and $a^3{\Sigma }^{+}$ Molecules
• Multi-channel modelling of the formation of vibrationally cold polar KRb molecules
• Prospects for making polar molecules with microwave fields
• Energy Dependence of Scattering Ground State Polar Molecules
• Long range forces between polar alkali diatoms aligned by external electric fields
• Achieving ground-state polar molecular condensates by chainwise atom-molecule adiabatic passage
• The twofold diabatization of the KRb $(1\sim 2{)}^1\Pi$ complex in the framework of \emph{ab initio} and deperturbation approaches
• Anderson Lattice Description of Photoassociation in an Optical Lattice
• External field control of spin-dependent rotational decoherence of ultracold polar molecules