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Resonantly Interacting Fermi-Fermi Mixture ofDy161andK40
Physical Review Letters ( IF 9.227 ) Pub Date : 2020-05-22 , DOI: 10.1103/physrevlett.124.203402
C. Ravensbergen; E. Soave; V. Corre; M. Kreyer; B. Huang (黄博); E. Kirilov; R. Grimm

We report on the realization of a Fermi-Fermi mixture of ultracold atoms that combines mass imbalance, tunability, and collisional stability. In an optically trapped sample of Dy161 and K40, we identify a broad Feshbach resonance centered at a magnetic field of 217 G. Hydrodynamic expansion profiles in the resonant interaction regime reveal a bimodal behavior resulting from mass imbalance. Lifetime studies on resonance show a suppression of inelastic few-body processes by orders of magnitude, which we interpret as a consequence of the fermionic nature of our system. The resonant mixture opens up intriguing perspectives for studies on novel states of strongly correlated fermions with mass imbalance.
更新日期:2020-05-22

 

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