Interactions and dynamics in Li + Li_2 ultracold collisions

Abstract

A potential energy surface for the lowest quartet electronic state of lithium trimer is developed and used to study spin-polarized Li + Li_2 collisions at ultralow kinetic energies. The potential energy surface allows barrierless atom exchange reactions. Elastic and inelastic cross sections are calculated for collisions involving a variety of rovibrational states of Li_2. Inelastic collisions are responsible for trap loss in molecule production experiments. Isotope effects and the sensitivity of the results to details of the potential energy surface are investigated. It is found that for vibrationally excited states the cross sections are only quite weakly dependent on details of the potential energy surface.

21 pages, 27 figures. Version 2 is final version as accepted for publication in J. Chem. Phys

References in corpus (30)

• Production of cold molecules via magnetically tunable Feshbach resonances
• Observation of Bose-Einstein Condensation of Molecules
• Weakly bound dimers of fermionic atoms
• Atom--Molecule Coherence in a Bose-Einstein Condensate
• Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
• Optical Production of Ultracold Polar Molecules
• Strongly enhanced inelastic collisions in a Bose-Einstein condensate near Feshbach resonances
• Production of Long-Lived Ultracold Li2 Molecules from a Fermi gas
• Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
• Variational calculations of dispersion coefficients for interactions between H, He, and Li atoms
• Observation of molecules produced from a Bose-Einstein condensate
• Formation of Quantum-Degenerate Sodium Molecules
• Lifetime of molecule-atom mixtures near a Feshbach resonance in 40K
• Quantum Dynamics of Ultracold Na + Na_2 collisions
• Experimental investigation of ultracold atom-molecule collisions
• Sympathetic cooling of bosonic and fermionic Lithium gases towards quantum degeneracy
• Dissociation and Decay of Ultra-cold Sodium Molecules
• Atom-molecule collisions in an optically trapped gas
• Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths
• Molecule formation in ultracold atomic gases
• Alkali and Alkaline Earth Metal Compounds: Core-Valence Basis Sets and Importance of Subvalence Correlation
• Ultracold Li + Li_2 collisions: bosonic and fermionic cases
• Three-body non-additive forces between spin-polarized alkali atoms
• Molecular collisions in ultracold atomic gases
• Ultracold quantum dynamics: spin-polarized K + K_2 collisions with three identical bosons or fermions
• Ultracold collisions involving heteronuclear alkali metal dimers
• Ultracold atom-molecule collisions and bound states in magnetic fields: tuning zero-energy Feshbach resonances in He-NH (3Sigma-)
• Long-range interactions of lithium atoms
• Long range intermolecular forces in triatomic systems: connecting the atom-diatom and atom-atom-atom representations
• Brane-World Black Holes in Randall-Sundrum Models

Cited by in corpus (32)

• Feshbach Resonances in Ultracold Gases
• Reactions of ultracold alkali metal dimers
• Low-energy collisions of NH3 and ND3 with ultracold Rb atoms
• Modeling sympathetic cooling of molecules by ultracold atoms
• Van der Waals coefficients for systems with ultracold polar alkali-metal molecules
• Non-relativistic ab initio calculations for $2^{2}S$, $2^{2}P$ and $3^{2}D$ lithium isotopes: Applications to polarizabilities and dispersion interactions
• Structure and thermochemistry of K${}_2$Rb, KRb${}_2$ and K${}_2$Rb${}_2$
• Prospects for sympathetic cooling of polar molecules: NH with alkali-metal and alkaline-earth atoms - a new hope
• The hyperfine energy levels of alkali metal dimers: ground-state homonuclear molecules in magnetic fields
• Feshbach resonances in ultracold atom-molecule collisions
• Formation of molecular oxygen in ultracold O + OH reaction
• The approach to chaos in ultracold atomic and molecular physics: statistics of near-threshold bound states for Li+CaH and Li+CaF
• The long-range non-additive three-body dispersion interactions for the rare gases, alkali and alkaline-earth atoms
• Molecular Collisions: from Near-cold to Ultra-cold
• Cooper Triples in Attractive Three-Component Fermions: Implication for Hadron-Quark Crossover
• Threshold resonance effects in reactive processes
• Quantum chaos in ultracold collisions between Yb(${}^1$S${}_0$) and Yb(${}^3$P${}_2$)
• Collisional properties of cold spin-polarized nitrogen gas: theory, experiment, and prospects as a sympathetic coolant for trapped atoms and molecules
• Signatures of Non-universal Quantum Dynamics of Ultracold Chemical Reactions of Polar Alkali-dimer Molecules with Alkali-metal Atoms: Li(${}^2$S) +NaLi($a^3{\Sigma }^{+}$) $\to$ Na(${}^2$S) + Li${}_2$($a^3{\Sigma }_u^{+}$)
• Jost function description of near threshold resonances for coupled-channel scattering
• Potential energy surface of the 2A' Li2+Li doublet ground state
• Core repulsion effects in alkali trimers
• Molecular Cluster Perturbation Theory. I. Formalism
• Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms
• Long-range three-body atom-diatom potential for doublet Li${}_3$
• Calculations of long-range three-body interactions for Li($2{}^{2}S$)-Li($2{}^{2}S$)-Li($2{}^{2}P$)
• Molecular Hydrogen: a benchmark system for Near Threshold Resonances at higher partial waves
• Inelastic losses in radiofrequency-dressed traps for ultracold atoms
• Floquet-Engineering of Feshbach Resonances in Ultracold Gases
• Product-state distribution after isotopic substitution in ultracold atom-molecule collisions
• Quantum Reactive Scattering of Ultracold Atoms and Molecules: Universality and Chaotic Dynamics
• Spin-polarized alkali-metal trimers revisited