Ruprecht Karls Universit├Ąt Heidelberg

New Preprint Online

We have conducted a study of atom-dimer scattering in an ultracold three-component Fermi gas consisting of 6Li atoms in three different hyperfine states |1>,|2> and |3>.
For this we have prepared three different mixtures of atoms and dimers and observed their decay via inelastic atom-dimer collisions. In the |1>-|23> atom-dimer mixture we have observed resonant enhancement of the loss at the crossings of two Efimov-like trimer states with the |1>-|23> atom-dimer threshold. We have also found that these trimer states can cause a suppression of |3>-|12> → |1>-|23> exchange reactions in the |3>-|12> mixture, which allows to control the rate constants for these processes.
For more details on these results see arXiv:1003.0600


Two-body loss coefficient of the I1>-I23> mixture vs. magnetic field: the red line is a fit according to universal theory.
Two-body loss coefficient of the I1>-I23> mixture vs. magnetic field: the red line is a fit according to universal theory.
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