Recently I was interested in the Efimov effect. I read some reference of related experimental research. I found all these experiments used ultra_cold atoms but not Bose-Einstein condensates(BECs) although all these group are able to creat BECs. So I want to know why people did not use BECs in this kind experiment?
Dose it due to the high density or the many-body correlation of BECs?
Note also that in the first detection of an Efimov state it was seen as a resonance in the three-body loss at a scattering length -850a0 (i.e. where the Efimov state joins the continuum). If you want to create a BEC you need to avoid this resonance because of atom loss + BEC:s with negative scatteirng length are generally unstable.
I am looking for the right field theoretical explaination of the formation of the Efimov quantum trios etc...