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要旨:
This thesis reports on experiments studying the few-body physics of three distinguishable
fermionic atoms with large scattering lengths. The experiments were
performed with ultracold gases of fermionic 6Li atoms in three different hyperfine
states. By tuning the strength of the interactions between the atoms with
Feshbach resonances and measuring the rate constants for inelastic three-atom
and atom-dimer collisions the intersections of two universal trimer states with the
three-atom and atom-dimer continuum could be located. Subsequently, one of
these Efimov states was directly observed with RF-association spectroscopy. Using
this technique the binding energy of this Efimov state was measured as a function
of the strength of the interparticle interactions. The experiments presented
in this thesis provide a nearly complete understanding of the universal few-body
physics of three-component Fermi gases of 6Li atoms. This understanding will
be the foundation for future studies of the many-body physics of three-component
Fermi gases.
