Role of Interactions in 87Rb-40K Bose-Fermi Mixtures in a 3D Optical Lattice

被引：146

作者：

Best, Th. ^{[1
]}

Will, S. ^{[1
]}

Schneider, U. ^{[1
]}

Hackermueller, L. ^{[1
]}

van Oosten, D. ^{[1
]}

Bloch, I. ^{[1
]}

Luehmann, D. -S. ^{[2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[2] Univ Hamburg, Inst Theoret Phys, D-20355 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.102.030408

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

We investigate the effect of interspecies interaction on a degenerate mixture of bosonic Rb-87 and fermionic K-40 atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the Rb-87-K-40 interaction is tuned over a wide range. Through an analysis of the Rb-87 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.

引用

页数：4

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