title: Generation of macroscopic pair-correlated atomic beams by four-wave mixing in Bose-Einstein condensates.
abstract: By colliding two Bose-Einstein condensates, we have observed strong bosonic stimulation of the elastic scattering process. When a weak input beam was applied as a seed, it was amplified by a factor of 20. This large gain atomic four-wave mixing resulted in the generation of two macroscopically occupied pair-correlated atomic beams.
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Vogels
authors.forename: K
authors.initials: K
authors.lastname: Xu
authors.forename: W
authors.initials: W
authors.lastname: Ketterle