Strongly interacting array of Bose-Einstein condensates trapped in a one-dimensional optical lattice

被引：6

作者：

Yamashita, Makoto ^{[1
,2
]}

Kato, Shinya ^{[2
,3
]}

Yamaguchi, Atsushi ^{[2
,4
]}

Sugawa, Seiji ^{[2
,3
]}

Fukuhara, Takeshi ^{[3
]}

Uetake, Satoshi ^{[2
,3
]}

Takahashi, Yoshiro ^{[2
,3
]}

机构：

[1] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[2] Japan Sci & Technol Agcy, CREST, Chiyoda Ku, Tokyo 1020075, Japan

[3] Kyoto Univ, Grad Sch Sci, Kyoto 6068502, Japan

[4] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 04期

关键词：

MOTT INSULATOR; ULTRACOLD; SPECTROSCOPY; TRANSITION;

D O I：

10.1103/PhysRevA.87.041604

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study a strongly interacting array of Bose-Einstein condensates trapped in a one-dimensional (1D) optical lattice. The system is described by a nonstandard 1D Bose-Hubbard model in which both the tunneling matrix element and the on-site atomic interaction depend on the lattice site due to the interaction broadening of the local wave function and the system inhomogeneity. We quantitatively compare theoretical analyses based on the Gutzwiller approximation with experimental observations obtained using ytterbium atoms. We show that atomic states are highly number squeezed owing to strong interatomic interactions as the lattice potential becomes deeper. Furthermore, the calculated inhomogeneous collisional broadening of spectroscopic line shapes agrees well with high-resolution spectra measured by using the ultranarrow magnetic quadrupole S-1(0)-P-3(2) transition.

引用

页数：5

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