Observation of Heteronuclear Feshbach Molecules from a 85Rb - 87Rb gas
Abstract
We report on the observation of ultracold heteronuclear Feshbach molecules. Starting with a 87Rb BEC and a cold atomic gas of 85Rb, we utilize previously unobserved interspecies Feshbach resonances to create up to 25,000 molecules. Even though the 85Rb gas is non-degenerate we observe a large molecular conversion efficiency due to the presence of a quantum degenerate 87Rb gas; this represents a key feature of our system. We compare the molecule creation at two different Feshbach resonances with different magnetic-field widths. The two Feshbach resonances are located at 265.440.15 G and 372.41.3 G. We also directly measure the small binding energy of the molecules through resonant magnetic-field association.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.