A dynamical process of optically trapped singlet ground state 85Rb133Cs molecules produced via short-range photoassociation
Abstract
We investigate the dynamical process of optically trapped X1Σ+ (v′′ = 0) state 85Rb133Cs molecules distributed in J′′ = 1 and J′′ = 3 rotational states. The considered molecules, formed from short-range photoassociation of mixed cold atoms, are subsequently confined in a crossed optical dipole trap. Based on a phenomenological rate equation, we provide a detailed study of the dynamics of 85Rb133Cs molecules during the loading and holding processes. The inelastic collisions of 85Rb133Cs molecules in the X1Σ+ (v′′ = 0, J′′ = 1 and J′′ = 3) states with ultracold 85Rb (or 133Cs) atoms are measured to be 1.0 (2) × 10−10 cm3 s−1 (1.2 (3) × 10−10 cm3 s−1). Our work provides a simple and generic procedure for studying the dynamical process of trapped cold molecules in the singlet ground states.