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Comptes Rendus de l Académie des Sciences - Series IV - Physics-Astrophysics

Formation of a Bose condensate of stable molecules via a Feshbach resonance

S. J. J. M. F. Kokkelmans, H. M. J. Vissers, BOUDEWIJN J. VERHAAR

Published Jun 1, 2001• 3 citations
Publisher
DOI
10.1016/s1296-2147(01)01205-7

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We model the formation of stable heteronuclear molecules via pulsed Raman photoassociation of a two-component Bose-Einstein condensate near a strong Feshbach resonance, for both counterintuitive and intuitive pulse sequencing. Compared to lasers alone, weak Raman photoassociation is enhanced by as much as a factor of ten (five) for a counterintuitive (intuitive) pulse sequence, whereas strong Raman photoassociation is barely enhanced at all---regardless of pulse sequence. Stronger intra-atom, molecule, or atom-molecule collisions lead to an expected decrease in conversion efficiency, but stronger ambient inter-atom collisions lead to an unexpected increase in the efficiency of stable molecule production. Numerical results agree reasonably with an analytical approximation.