Self Focussing as a Coherence Propagation Phenomena. An Application to Calculate the Coherence Length for an Atom Laser

摘要

A theoretical description in terms of the coherence propagation is given forself-focussing. The concept of coherence length is defined in terms of free,self-focussing propagation giving results in accordance with well knownexperimental criteria for the laser. Extension of the method is given for anAtom Laser showing good results in agreement with recents numerical results ofTrippenbach et. al.: J. Phys. B:At. Mol. Opt. Phys. 33, 47-54 (2000).