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

Research output: Contribution to journal › Article › peer-review

145 Citations (Scopus)

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.

Original language	English
Article number	030408
Journal	Physical Review Letters
Volume	102
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.102.030408
Publication status	Published - 20 Jan 2009
Externally published	Yes

Access to Document

10.1103/PhysRevLett.102.030408

Cite this

@article{0db2d751234c459d81c177dbd3078387,

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.\}",

year = "2009",

month = jan,

day = "20",

doi = "10.1103/PhysRevLett.102.030408",

language = "English",

volume = "102",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Role of interactions in Rb87-K40 Bose-Fermi mixtures in a 3D optical lattice

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.

U2 - 10.1103/PhysRevLett.102.030408

DO - 10.1103/PhysRevLett.102.030408

M3 - Article

AN - SCOPUS:60149102465

SN - 0031-9007

VL - 102

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

M1 - 030408

ER -

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

Abstract

Access to Document

Fingerprint

Cite this