The No-sticking Effect in Ultra-cold Collisions

Details The No-sticking Effect in Ultra-cold Collisions The No-sticking Effect in Ultra-cold Collisions

2000-10-27

arxiv.org/abs/physics/0010068v1

Physics

Atomic Physics

19 pages single column, 2 figures. Submitted to Physical Review B

Scientific paper

We provide the theoretical basis for understanding the phenomenon in which an ultra cold atom incident on a possibly warm target will not stick, even in the large $n$ limit where $n$ is the number of internal degrees of freedom of the target. Our treatment is non-perturbative in which the full many-body problem is viewed as a scattering event purely within the context of scattering theory. The question of sticking is then simply and naturally identified with the formation of a long lived resonance. One crucial physical insight that emerges is that the many internal degrees of freedom serve to decohere the incident one body wavefunction, thus upsetting the delicate interference process necessary to form a resonance in the first place. This is the physical reason for not sticking.

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