  We analyze coherent two-color photoassociation of a Bose-Einstein condensate,
focusing on stimulated Raman adiabatic passage (STIRAP) in free-bound-bound
transitions from atoms to molecules. This problem is of particular interest
since STIRAP is predicted to be necessarily absent in the nondegenerate case
[Javanainen and Mackie, Phys. Rev. A 58, R789 (1998)]. However,
Bose-stimulation enhances the free-bound dipole matrix element for an atomic
condensate, and photoassociative STIRAP turns out to be a viable mechanism for
converting an atomic condensate to a molecular condensate with near-unit
efficiency.
