Ab initio interaction potentials and scattering lengths for ultracold mixtures of metastable helium and alkali-metal atoms

Abstract

We have obtained accurate ab initio quartet potentials for the diatomic metastable triplet helium + alkali-metal (Li, Na, K, Rb) systems, using all-electron restricted open-shell coupled cluster singles and doubles with noniterative triples corrections [CCSD(T)] calculations and accurate calculations of the long-range $C_6$ coefficients. These potentials provide accurate ab initio quartet scattering lengths, which for these many-electron systems is possible, because of the small reduced masses and shallow potentials that results in a small amount of bound states. Our results are relevant for ultracold metastable triplet helium + alkali-metal mixture experiments.

8 pages, 2 figures

References in corpus (8)

• Observation of Quantum Effects in sub Kelvin Cold Reactions
• A Degenerate Bose-Fermi Mixture of Metastable Atoms
• Scattering lengths in isotopologues of the RbYb system
• Observation of orbiting resonances in He(3S1) + NH3 Penning ionization
• High-precision spectroscopy of the forbidden 2 3S1 - 2 1P1 transition in quantum degenerate metastable helium
• Bose-Einstein condensate of metastable helium for quantum correlation experiments
• Spectroscopy of the a^3Σ_u^+ state and the coupling to the X^1Σ_g^+ state of K_2
• Ultracold mixtures of metastable He and Rb: scattering lengths from ab initio calculations and thermalization measurements

Cited by in corpus (5)

• Rydberg molecules for ion-atom scattering in the ultracold regime
• Quantum-State Controlled Penning Ionization Reactions between Ultracold Alkali and Metastable Helium Atoms
• Penning collisions between supersonically expanded metastable helium atoms and laser-cooled lithium atoms
• An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms
• Spin-state-controlled chemi-ionization reactions between metastable helium atoms and ground-state lithium atoms