Number statistics of ultracold bosons in an optical lattice

被引：0
|
作者：
Wen, Yu Chuan [1 ]
Gan, Jing Yu [2 ]
Lu, Xiancong [3 ]
Yu, Yue [3 ]
机构：
[1] Capital Normal Univ, Dept Phys, Beijing 100037, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[3] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 21期
关键词：
D O I：
10.1088/0953-8984/20/21/215227
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the number statistics of ultracold bosons in an optical lattice by performing quantum Monte Carlo simulations for a 1D Bose-Hubbard model with an external harmonic trap. We calculate the density profile of the system and observe the formation of a Mott plateau as the total number of atoms increases. We also calculate the average probability P-alpha for a particle to occupy the Fock state vertical bar alpha > (alpha = 1, 2, 3, and 4), and confirm that the evolution of P-2 is a signature of the formation of a Mott insulator plateau in an ultracold atomic system. Our numerical result agrees qualitatively with the experiment and the mean field calculation.
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页数：4
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