Dual-Species Bose-Einstein Condensates of Lithium And Cesium

We present the creation of dual-species Bose-Einstein condensates (BECs) of lithium (Li) and cesium (Cs), unveiling a novel mixture with potential for advancing the exploration of quantum gas mixtures. In this work, we demonstrate precise tuning of both intra- and interspecies interactions, as well as the capability to manipulate each species to achieve ultra-low temperatures. Leveraging the large mass disparity between Li and Cs, these dual-species condensates provide unique research opportunities, particularly in the investigation of polarons, Efimov trimers, and ground-state bi-alkali molecules.