Feshbach-resonance-induced atomic filamentation and quantum pair correlation in atom-laser-beam propagation
arXiv:cond-mat/0208589 · doi:10.1103/PhysRevLett.90.140401
Abstract
We study the propagation of an atom laser beam through a spatial region with a magnetic field tuned to a Feshbach resonance. Tuning the magnetic field below the resonance produces an effective focusing Kerr medium that causes a modulational instability of the atomic beam. Under appropriate circumstances, this results in beam breakup and filamentation seeded by quasi-particle fluctuations, and in the generation of correlated atomic pairs.