Calculation of the interspeciess-wave scattering length in an ultracold Na-Rb vapor

Abstract

We report the calculation of the interspecies scattering length for the sodium-rubidium (Na-Rb) system. We present improved hybrid potentials for the singlet X 1 Σ + and triplet a 3 Σ + ground states of the NaRb molecule, and calculate the singlet and triplet scattering lengths as and at for the isotopomers 23 Na 87 Rb and 23 Na 85 Rb. Using these values, we assess the prospects for producing a stable two-species Bose-Einstein condensate in the Na-Rb system.

The coupling of the X1Σ+and a3Σ+states of the atom pair Na + Cs and modelling cold collisions

“…The coefficients C 6 , C 8 and C 10 and the exchange energy parameter A ex were fitted. Parameters β and γ were estimated as discussed for heteronuclear species in [13] from the atomic ionization energies of Na and Cs. For short internuclear distances R R i the potential is smoothly extended with the expression…”

The adiabatic potentials of low-lying electronic states of the NaRb molecule

“…The NaRb molecule is a frequently studied alkali dimer. It is a special candidate for two species of BEC [5].…”

Quantum phase diagrams and time-of-flight pictures of spin-1 Bose systems in honeycomb optical lattices

“…To offer a direct comparations with possible experimental observations, as an example, we inves tigate the timeofflight picture of spinor1 Bose gases in a honeycomb optical lattice in antiferromagnetic cases. This can be realized by trapping ultracold 23 Na [3] atoms in opti cal lattices, with the scattering lengths for different channels being ≈ a a 50 0 B and ≈ a a 56 2 B respectively [48,49] (a B being the Bohr radius).…”