Abstract
We consider atomic mixtures of bosons and two-component fermions in an optical lattice potential. We show that if the bosons are in a Mott-insulator state with precisely one atom per lattice, the photoassociation of bosonic and fermionic atoms into heteronuclear fermionic molecules is described by the Anderson lattice model. We determine the ground-state properties of an inhomogeneous version of that model in the strong atom-molecule coupling regime, including an additional harmonic trap potential. Various spatial structures arise from the interplay between the atom-molecule correlations and the confining potential. Perturbation theory with respect to the tunneling coupling between fermionic atoms shows that antiferromagnetic correlations develop around a spin-singlet core of fermionic atoms and molecules.
Original language | English (US) |
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Article number | 021601 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 73 |
Issue number | 2 |
DOIs | |
State | Published - 2006 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics