



@article {1301,
	title = {Spatial separation in a thermal mixture of ultracold $^{174}$Yb and  $^{87}$Rb atoms
},
	journal = {Physical Review A},
	volume = {83},
	year = {2011},
	month = {2011/4/21},
	abstract = {  We report on the observation of unusually strong interactions in a thermal
mixture of ultracold atoms which cause a significant modification of the
spatial distribution. A mixture of $^{87}$Rb and $^{174}$Yb with a temperature
of a few $\mu$K is prepared in a hybrid trap consisting of a bichromatic
optical potential superimposed on a magnetic trap. For suitable trap parameters
and temperatures, a spatial separation of the two species is observed. We infer
that the separation is driven by a large interaction strength between
$^{174}$Yb and $^{87}$Rb accompanied by a large three-body recombination rate.
Based on this assumption we have developed a diffusion model which reproduces
our observations.
},
	doi = {10.1103/PhysRevA.83.040702},
	url = {http://arxiv.org/abs/1104.1722v1},
	author = {Florian Baumer and Frank M{\"u}nchow and Axel G{\"o}rlitz and Stephen E. Maxwell and Paul S. Julienne and Eite Tiesinga}
}
@article {1275,
	title = {Spontaneous dissociation of long-range Feshbach molecules},
	journal = {Physical Review Letters},
	volume = {94},
	year = {2005},
	month = {2005/1/18},
	abstract = {  We study the spontaneous dissociation of diatomic molecules produced in cold
atomic gases via magnetically tunable Feshbach resonances. We provide a
universal formula for the lifetime of these molecules that relates their decay
to the scattering length and the loss rate constant for inelastic spin
relaxation. Our universal treatment as well as our exact coupled channels
calculations for $^{85}$Rb dimers predict a suppression of the decay over
several orders of magnitude when the scattering length is increased. Our
predictions are in good agreement with recent measurements of the lifetime of
$^{85}$Rb$_2$.
},
	doi = {10.1103/PhysRevLett.94.020402},
	url = {http://arxiv.org/abs/cond-mat/0408387v2},
	author = {Thorsten Koehler and Eite Tiesinga and Paul S. Julienne}
}
