Quantized squeezing and even-odd asymmetry of trapped bosons

被引：6

作者：

Hu, Shijie ^{[1
,2
]}

Wen, Yuchuan ^{[2
]}

Yu, Yue ^{[2
]}

Normand, B. ^{[1
]}

Wang, Xiaoqun ^{[1
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW A | 2009年 / 80卷 / 06期

基金：

美国国家科学基金会;

关键词：

MOTT INSULATOR; SUPERFLUID;

D O I：

10.1103/PhysRevA.80.063624

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the exact nature of the superfluid-to-Mott-insulator crossover for interacting bosons on an optical lattice in a one-dimensional harmonic trap by high-precision density-matrix renormalization-group calculations. The results reveal an intermediate regime characterized by a cascade of microscopic steps. These arise as a consequence of individual boson "squeezing" events and display an even-odd alternation dependent on the trap symmetry. We discuss the experimental observation of this behavior, which is generic in an external trapping potential.

引用

页数：4

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