Dynamic response of trapped ultracold bosons on optical lattices

被引：39

作者：

Batrouni, GG

Assaad, FF

Scalettar, RT

Denteneer, PJH

机构：

[1] Univ Nice Sophia Antipolis, Inst Nonlineaire Nice, F-06560 Valbonne, France

[2] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[4] Leiden Univ, Inst Lorentz, NL-2300 RA Leiden, Netherlands

来源：

PHYSICAL REVIEW A | 2005年 / 72卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.72.031601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the dynamic response of ultracold bosons trapped in one-dimensional optical lattices using Quantum Monte Carlo simulations of the boson Hubbard model with a confining potential. The dynamic structure factor reveals the inhomogeneous nature of the low temperature state, which contains coexisting Mott insulator and superfluid regions. We present new evidence for local quantum criticality and discuss implications for the experimental excitation spectrum of Rb-87 atoms confined in one dimension.

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页数：4

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