CQD special colloquium

10. April 2017 13:00

Visible Efimov effect in the spectroscopy of Bose polarons

Associate Professor Xiaoling Cui
Institute of Physics, Chinese Academy of Sciences, Beijing, China

Bose polaron is generally believed as a promising many-body system to host the novel Efimov correlations. Nevertheless, no signature of Efimov physics has been reported in the existing Bose polaron experiments up to date. In this talk, I will show that the Efimov physics can be directly observed in the spectroscopy measurement of Bose polarons with large mass imbalance. Taking the ⁶Li(impurity)- ¹³³Cs(bosons) system as an example, our calculation shows two visible Efimov branches in the spectral response of ⁶Li atoms, as well as the spectral broadening due to their hybridizations with the attractive polaron branch. These results suggest that the highly mass-imbalanced atomic mixtures can serve as an ideal platform for the observation of intriguing few-body correlations in a many-body environment.