Role of interactions in Rb87-K40 Bose-Fermi mixtures in a 3D optical lattice

Th Best; S. Will; U. Schneider; L. Hackermüller; D. Van Oosten; I. Bloch; D. S. Lühmann

doi:10.1103/PhysRevLett.102.030408

Role of interactions in Rb87-K40 Bose-Fermi mixtures in a 3D optical lattice

Th Best
, S. Will
, U. Schneider
, L. Hackermüller
, D. Van Oosten
, I. Bloch
, D. S. Lühmann

Institut für Physik
Johannes Gutenberg University
FOM Institute for Atomic and Molecular Physics (AMOLF)
I. Institut für Theoretische Physik
Universität Hamburg

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

145 Citations (Scopus)

Résumé

We investigate the effect of interspecies interaction on a degenerate mixture of bosonic Rb87 and fermionic K40 atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the Rb87-K40 interaction is tuned over a wide range. Through an analysis of the Rb87 momentum distribution, we find a pronounced asymmetry between strong repulsion and strong attraction. In the latter case, we observe a marked shift in the superfluid to Mott insulator transition, which we attribute to a renormalization of the Bose-Hubbard parameters due to self-trapping.

langue originale	Anglais
Numéro d'article	030408
journal	Physical Review Letters
Volume	102
Numéro de publication	3
Les DOIs	https://doi.org/10.1103/PhysRevLett.102.030408
état	Publié - 20 janv. 2009
Modification externe	Oui

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10.1103/PhysRevLett.102.030408

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title = "Role of interactions in Rb87-K40 Bose-Fermi mixtures in a 3D optical lattice",

abstract = "We investigate the effect of interspecies interaction on a degenerate mixture of bosonic Rb87 and fermionic K40 atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the Rb87-K40 interaction is tuned over a wide range. Through an analysis of the Rb87 momentum distribution, we find a pronounced asymmetry between strong repulsion and strong attraction. In the latter case, we observe a marked shift in the superfluid to Mott insulator transition, which we attribute to a renormalization of the Bose-Hubbard parameters due to self-trapping.",

author = "Th Best and S. Will and U. Schneider and L. Hackerm{\"u}ller and \{Van Oosten\}, D. and I. Bloch and L{\"u}hmann, \{D. S.\}",

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AU - Best, Th

AU - Will, S.

AU - Schneider, U.

AU - Hackermüller, L.

AU - Van Oosten, D.

AU - Bloch, I.

AU - Lühmann, D. S.

PY - 2009/1/20

Y1 - 2009/1/20

N2 - We investigate the effect of interspecies interaction on a degenerate mixture of bosonic Rb87 and fermionic K40 atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the Rb87-K40 interaction is tuned over a wide range. Through an analysis of the Rb87 momentum distribution, we find a pronounced asymmetry between strong repulsion and strong attraction. In the latter case, we observe a marked shift in the superfluid to Mott insulator transition, which we attribute to a renormalization of the Bose-Hubbard parameters due to self-trapping.

AB - We investigate the effect of interspecies interaction on a degenerate mixture of bosonic Rb87 and fermionic K40 atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the Rb87-K40 interaction is tuned over a wide range. Through an analysis of the Rb87 momentum distribution, we find a pronounced asymmetry between strong repulsion and strong attraction. In the latter case, we observe a marked shift in the superfluid to Mott insulator transition, which we attribute to a renormalization of the Bose-Hubbard parameters due to self-trapping.

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DO - 10.1103/PhysRevLett.102.030408

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JO - Physical Review Letters

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ER -

Role of interactions in Rb87-K40 Bose-Fermi mixtures in a 3D optical lattice

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