Ultracold atom-dimer long-range interactions beyond the $1/R^n$ expansion

Abstract

We investigate theoretically the combination of first-order quadrupole-quadrupole and second-order dipole-dipole effects on the long-range electrostatic interactions between a ground-state homonuclear alkali-metal dimer and an excited alkali-metal atom. As the electrostatic energy is comparable to the dimer rotational structure, we develop a general description of the long-range interactions which allows for couplings between the dimer rotational levels. The resulting adiabatic potential energy curves, which exhibit avoided crossings, cannot be expanded on the usual $1/R^n$ series. We study in details the breakdown of this approximation in the particular case Cs${}_2+$Cs. Our results are found promising in the prospect of accomplishing the photoassociation of ultracold trimers.

Submitted to EPJD, special issue "Cold Quantum Matter - Achievements and Prospects"

References in corpus (22)

• A High Phase-Space-Density Gas of Polar Molecules
• Observation of Bose-Einstein Condensation of Molecules
• Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Quantum Gas of Deeply Bound Ground State Molecules
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
• Schemes for robust quantum computation with polar molecules
• Optical pumping and vibrational cooling of molecules
• Calculations of static dipole polarizabilities of alkali dimers. Prospects for alignment of ultracold molecules
• Inelastic collisions of ultra-cold heteronuclear molecules in an optical trap
• Kinetics and Dynamics of the S(^1D_2) + H_2 \to SH + H Reaction at Very Low Temperatures and Collision Energies
• Dispersion interactions and reactive collisions of ultracold polar molecules
• Enhancement of variation of fundamental constants in ultracold atom and molecule systems near Feshbach resonances
• Collisions between tunable halo dimers: exploring an elementary four-body process with identical bosons
• Low-energy inelastic collisions of OH radicals with He atoms and D${}_2$ molecules
• Enhancement of the formation of ultracold ${}^{85}$Rb${}_2$ molecules due to resonant coupling
• Efficient formation of deeply bound ultracold molecules probed by broadband detection
• Stability of fermionic Feshbach molecules in a Bose-Fermi mixture
• Photoassociation of a cold atom-molecule pair II: second order perturbation approach
• Photoassociation of a cold atom-molecule pair: long-range quadrupole-quadrupole interactions

Cited by in corpus (5)

• Long-range interactions between polar alkali-metal diatoms in external electric fields
• Long-range interactions in the ozone molecule: spectroscopic and dynamical points of view
• Theory of long-range ultracold atom-molecule photoassociation
• Dissociative recombination and vibrational excitation of BF${}^{+}$ in low energy electron collisions
• Long-range interactions between ultracold atoms and molecules including atomic spin-orbit