Calculation of elastic scattering properties in ultracold Fermi-Bose and Bose-Bose Rb-K vapor

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Ozturk M., Ozcelik S.

Journal of the Physical Society of Japan, vol.75, no.3, 2006 (SCI-Expanded) identifier identifier


The calculation of the elastic scattering properties of mixtures composed of ultracold Rb-K atoms is reported and compared with experimental results in detail. The improved potentials for both the singlet and triplet molecular states of Rb-K are presented, and the scattering lengths at and the effective range re are calculated with numeric and semiclassical methods for Rb-K in the triplet and singlet state. In addition, the convergence of these scattering properties depending on a K0 parameter is investigated using quantum defect theory. Other results of the evaporative cooling that include the cross section and the spin-charge cross section, the rate coefficient as a function of the energy and ultralow temperature are also presented in this study. ©2006 The Physical Society of Japan.