Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 40: Poster: Ultra-cold atoms, ions and BEC

A 40.14: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.V

Inelastic Confinement-Induced Resonances in Low-Dimensional Quantum Systems — •Simon Sala, Philipp-Immanuel Schneider, and Alejandro Saenz — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin

Ultracold atomic systems of reduced dimensionality show intriguing phenomena like fermionization of bosons in the Tonks-Girardeau gas or confinement-induced resonances (CIRs) which allow for a manipulation of the interaction strength by varying the trap geometry. Here, a theoretical model is presented describing inelastic confinement-induced resonances which appear in addition to the regular (elastic) ones and were observed in the recent loss experiment of Haller et al. in terms of particle losses [1]. These resonances originate from possible molecule formation due to the coupling of center-of-mass and relative motion. The model is verified by ab initio calculations and predicts the resonance positions in 1D as well as in 2D confinement in agreement with the experiment. This resolves the contradiction of the experimental observations to previous theoretical predictions.

[1] E. Haller et al., Phys. Rev. Lett. 104, 153203 (2010).