Abstract
We present measurements of interspecies thermalization between ultracold samples of and either or . The two species are trapped in a far-off-resonance optical dipole trap and is sympathetically cooled by Yb. We extract effective interspecies thermalization cross sections by fitting the thermalization measurements to a kinetic model, giving and . We perform quantum scattering calculations of the thermalization cross sections and optimize the CsYb interaction potential to reproduce the measurements. We predict scattering lengths for all isotopic combinations of Cs and Yb. We also demonstrate the independent production of and Bose-Einstein condensates using the same optical dipole trap, an important step toward the realization of a quantum-degenerate mixture of the two species.
- Received 10 April 2017
DOI:https://doi.org/10.1103/PhysRevA.96.012704
©2017 American Physical Society