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29 March 2024
 
  » arxiv » 0805.0623

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Realization of a strongly interacting Bose-Fermi mixture from a two-component Fermi gas
Yong-il Shin ; André Schirotzek ; Christian H. Schunck ; Wolfgang Ketterle ;
Date 6 May 2008
AbstractWe 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 $^6$Li 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.
Source arXiv, 0805.0623
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