%0 Journal Article %J Physical Review Letters %D 2008 %T Two-body transients in coupled atomic-molecular BECs %A Pascal Naidon %A Eite Tiesinga %A Paul S. Julienne %X We discuss the dynamics of an atomic Bose-Einstein condensate when pairs of atoms are converted into molecules by single-color photoassociation. Three main regimes are found and it is shown that they can be understood on the basis of time-dependent two-body theory. In particular, the so-called rogue dissociation regime [Phys. Rev. Lett., 88, 090403 (2002)], which has a density-dependent limit on the photoassociation rate, is identified with a transient regime of the two-atom dynamics exhibiting universal properties. Finally, we illustrate how these regimes could be explored by photoassociating condensates of alkaline-earth atoms. %B Physical Review Letters %V 100 %8 2008/3/3 %G eng %U http://arxiv.org/abs/0707.2963v2 %N 9 %! Phys. Rev. Lett. %R 10.1103/PhysRevLett.100.093001