Wolfgang Ketterle
Department of Physics and Research Laboratory of Electronics
Massachusetts Institute of Technology

Many special properties of Bose-Einstein condensates involve the dramatic
enhancement or suppression of physical processes. For example, the
suppression of collisions and dissipation leads to superfluidity, and the
enhancement of scattering is at the heart of matter wave amplification and
the atom laser. We have studied the suppression and enhancement of elastic
collisions of impurity atoms, the suppression of dissipation for a moving
object, and the suppression and enhancement of light scattering.
Bosonically enhanced Rayleigh scattering was used to amplify either atoms
or light in a condensate. The talk will review these experiments and
discuss common roots and differences of these phenomena.