Ultracold Atoms in a Tunable Optical Kagome Lattice

被引：403

作者：

Jo, Gyu-Boong ^{[1
]}

Guzman, Jennie ^{[1
]}

Thomas, Claire K. ^{[1
]}

Hosur, Pavan ^{[1
]}

Vishwanath, Ashvin ^{[1
,2
]}

Stamper-Kurn, Dan M. ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 04期

基金：

美国国家科学基金会;

关键词：

DIFFRACTION; LIGHT;

D O I：

10.1103/PhysRevLett.108.045305

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We realize a two-dimensional kagome lattice for ultracold atoms by overlaying two commensurate triangular optical lattices generated by light at the wavelengths of 532 and 1064 nm. Stabilizing and tuning the relative position of the two lattices, we explore different lattice geometries including a kagome, a one-dimensional stripe, and a decorated triangular lattice. We characterize these geometries using Kapitza-Dirac diffraction and by analyzing the Bloch-state composition of a superfluid released suddenly from the lattice. The Bloch-state analysis also allows us to determine the ground-state distribution within the superlattice unit cell. The lattices implemented in this work offer a near-ideal realization of a paradigmatic model of many-body quantum physics, which can serve as a platform for future studies of geometric frustration.

引用

页数：5

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