Portal de Periódicos da CAPES

Realization of a Strongly Interacting Bose-Fermi Mixture from a Two-Component Fermi Gas

2008; American Physical Society; Volume: 101; Issue: 7 Linguagem: Inglês

10.1103/physrevlett.101.070404

1092-0145

Yong-il Shin, André Schirotzek, Christian H. Schunck, Wolfgang Ketterle,

Quantum, superfluid, helium dynamics

We show the emergence of a strongly interacting Bose-Fermi mixture from a two-component Fermi mixture with population imbalance. By analyzing in situ density profiles of 6Li atoms in the BCS-BEC crossover regime, we identify a critical interaction strength, beyond which all minority atoms pair up with majority atoms and form a Bose condensate. This is the regime where the system can be effectively described as a boson-fermion mixture. We determine the dimer-fermion and dimer-dimer scattering lengths and beyond-mean-field contributions. Our study realizes a gedanken experiment of bosons immersed in a Fermi sea of one of their constituents, revealing the composite nature of the bosons.