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primary topic: Few-body physics in ultracold Fermi gases

Few-body physics in ultracold Fermi gases
type: Article
abstract: This thesis reports on experimental studies of few-body physics in ultracold Fermi gases. The main part is devoted to the first realisation of an ultracold three-component Fermi gas in thermal equilibrium that consists of atoms in the three lowest spin states of 6Li. In first experiments the collisional stability of the gas was investigated in dependence of the interparticle interaction. The interaction strength was tuned by an external magnetic field employing Feshbach resonances in all three two-body scattering channels. At two magnetic field values a resonant enhancement of three-body loss was observed that can be explained by an Efimov-like trimer consisting of one atom in each of the three states which crosses the continuum twice in the studied magnetic field region. The behaviour of three-body loss rates could be understood by taking into account a variation of the lifetime of the trimer with the magnetic field. These experiments were performed with large ensembles of atoms. A finite deeply degenerate Fermi gas consisting of a controlled number of atoms may serve as a clean model for finite Fermi systems as for example atomic nuclei. An approach for the preparation of such a gas is discussed and first experimental steps are presented.
date: 2009
status: published
author list: authors
type: EPrint
type: DoctoralThesisEPrint
is part of: repository
has document: Few-body physics in ultracold Fermi gases (PDF)
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subject: 530 Physik

Few-body physics in ultracold Fermi gases (PDF)
type: Document
has file: Dissertation_Timo_Bastian_Ottenstein.pdf
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Timo Bastian Ottenstein
type: Person
given name: Timo Bastian
family name: Ottenstein

Few-body physics in ultracold Fermi gases (Other)
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primary topic: Few-body physics in ultracold Fermi gases

530 Physik
type: Concept
preferred label: 530 Physics @en