Reconstruction of Rb-Rb inter-atomic potential from ultracold Bose-gas collision

Barnab\'as Apagyi; D\'aniel Schumayer; Oliver Melchert; Werner Scheid

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Reconstruction of Rb-Rb inter-atomic potential from ultracold Bose-gas collision

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arxiv cond-mat/0702568 v1 pith:NL2KNT5O submitted 2007-02-24 cond-mat.other

Dániel Schumayer , Oliver Melchert , Werner Scheid , Barnabás Apagyi This is my paper

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keywords collisionbose-gasexperimentsenergyscatteringattractionbelowchanges

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Scattering phase shifts obtained from 87Rb Bose-gas collision experiments are used to reconstruct effective potentials resulting, self-consistently, in the same scattering events observed in the experiments at a particular energy. We have found that the interaction strength close to the origin suddenly changes from repulsion to attraction when the collision energy crosses, from below, the l=2 shape resonance position at E = 275 mikroK. This observation may be utilized in outlining future Bose-gas collision experiments.

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