Density fluctuations of a hard-core Bose gas in a one-dimensional lattice near the Mott insulating phase

被引：7

作者：

Ates, C ^{[1
]}

Moseley, C ^{[1
]}

Ziegler, K ^{[1
]}

机构：

[1] Univ Ausgburg, Inst Phys, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.71.061601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The characteristic oscillations of the density-density correlation function and the resulting structure factor are studied for a hard-core Bose gas in a one-dimensional lattice. Their wavelength diverges as the system undergoes a continuous transition from an incommensurate to a Mott insulating phase. The transition is associated with a unit static structure factor and a vanishing sound velocity. The qualitative picture is unchanged when a weak confining potential is applied to the system.

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页数：4

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