Resonantly Interacting Fermi-Fermi Mixture of Dy 161 and K 40
Abstract
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 Dy 161 and K 40 , 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2020
- DOI:
- 10.1103/PhysRevLett.124.203402
- arXiv:
- arXiv:1909.03424
- Bibcode:
- 2020PhRvL.124t3402R
- Keywords:
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- Condensed Matter - Quantum Gases;
- Condensed Matter - Superconductivity;
- Physics - Atomic Physics
- E-Print:
- Revised version v3