Cold Collisions in a K-Rb two species dipole trap

Gustavo Deczka Telles, Sérgio Ricardo Muniz, Vanderlei Salvador Bagnato +1 more

Summary form only given. Several theoretical studies have recently been published, proposing a new series of experiments involving two different species of atoms trapped together: two species BEC and heteronuclear cold collisions. As in the case of single species, these experiments require that samples be obtained at high density. Therefore, an important step is the understanding and possible control of heteronuclear collisions. In this context, the study of trap loss in a binary mixture comes at the right time and is significant. We report on a measurement of cross species trap loss rate for a system composed of /sup 39/K and /sup 85/Rb, and we implement an adapted Gallagher-Pritchard model to attempt to explain the experimental observations.

Jader Cabral, Luis Gon ccalves, Jorge Douglas Massayuki Kondo +1 more

Gustavo Deczka Telles, Luís Gustavo Marcassa, Sérgio Ricardo Muniz +4 more

We report results on inelastic cold collisions for a mixed species magneto-optical trap containing Na and Rb. The rate of collisional trap loss of Na is due to different contributions: Na-Na and Na-Rb collisions. Both parts are investigated with respect to trap laser intensity and frequency. The observations are explained based on a Gallagher-Pritchard model. Possibilities for studies and applications involving mixed species traps are discussed.

Mark Yeo, Brian C. Sawyer, Benjamin Stuhl +7 more

Peter Hannaford

Gustavo Deczka Telles, Wilton Garcia, Luís Gustavo Marcassa +6 more

We investigate inelastic cold collisions in a Rb-Cs mixed-species trap where the rubidium trap loss rate was measured. We present the experimental results and a qualitative discussion for the observation. These studies are relevant for high-resolution atomic and molecular spectroscopy, and for the production of mixed-species Bose-Einstein condensates.