Orateur
Dr
Ludovic pricoupenko
(LPTMC - Université Pierre et Marie Curie (Paris 6))
Description
Ultra-cold atoms permit to explore few-body systems in regimes where two-body scattering is resonant. The zero-range approximation of the pairwise interaction is especially adapted to the so-called unitary regime, while for a large but finite scattering length or also in p wave resonances, more detailed approaches are needed for describing few-body systems. In this talk, we show the interest of different models of interaction in the analysis of several few-body properties found recently. In particular, the separable two-channel model which encapsulates the Feshbach resonance mechanism appears as a relevant tool for ultra-cold atoms and the description of deviations to universal laws while leading to integral equations having the same degree of complexity as zero-range approaches.
Author
Dr
Ludovic pricoupenko
(LPTMC - Université Pierre et Marie Curie (Paris 6))
Co-auteurs
Dr
Christophe Mora
(LPA - Université Denis Diderot (Paris 7))
Dr
Mattia Jona-Lasinio
(ITP - Leibniz Universität Hannover)
Dr
Yvan Castin
(Laboratoire Kastler Brossel - CNRS (Paris))
