Localization of bosonic atoms by fermionic impurities in a three-dimensional optical lattice

被引：255

作者：

Ospelkaus, S. ^{[1
]}

Ospelkaus, C. ^{[1
]}

Wille, O. ^{[1
]}

Succo, M. ^{[1
]}

Ernst, P. ^{[1
]}

Sengstock, K. ^{[1
]}

Bongs, K. ^{[1
]}

机构：

[1] Inst Laserphys, D-22761 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.96.180403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe a localized phase of ultracold bosonic quantum gases in a 3-dimensional optical lattice induced by a small contribution of fermionic atoms acting as impurities in a Fermi-Bose quantum gas mixture. In particular, we study the dependence of this transition on the fermionic K-40 impurity concentration by a comparison to the corresponding superfluid to Mott-insulator transition in a pure bosonic Rb-87 gas and find a significant shift in the transition parameter. The observed shift is larger than expected based on a simple mean-field argument, which indicates that disorder-related effects play a significant role.

引用

页数：4

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