Cold atoms in a two-dimensional triangular optical lattice as an artificial frustrated system

被引：32

作者：

Chen, Yao-Hua ^{[1
]}

Wu, Wei ^{[1
]}

Tao, Hong-Shuai ^{[1
]}

Liu, Wu-Ming ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW A | 2010年 / 82卷 / 04期

关键词：

FERMI GAS; MOTT INSULATOR; ULTRACOLD; SUPERFLUIDITY;

D O I：

10.1103/PhysRevA.82.043625

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the strongly correlated effect of cold atoms in a triangular optical lattice using the dynamical cluster approximation combined with the continuous-time quantum Monte Carlo method. When the interaction increases, the Fermi surface evolves from a circular ring into a flat plane, and the system transitions from a Fermi liquid into a Mott insulator. The transition between the Fermi liquid and a pseudogap shows a reentrant behavior due to the Kondo effect. We give an experimental protocol to observe these phenomena in future experiments by varying the lattice depth and the atomic interaction via the Feshbach resonance.

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页数：6

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