Band-gap structure and chiral discrete solitons in optical lattices with artificial gauge fields

被引：8

作者：

Ye, Qinzhou ^{[1
,2
]}

Qin, Xizhou ^{[1
]}

Li, Yongyao ^{[3
]}

Zhong, Honghua ^{[1
]}

Kivshar, Yuri S. ^{[4
]}

Lee, Chaohong ^{[1
,2
,4
]}

机构：

[1] Sun Yat Sen Univ, Sch Phys & Astron, Lab Quantum Engn & Quantum Metrol, Zhuhai Campus, Zhuhai 519082, Peoples R China

[2] Sun Yat Sen Univ, Key Lab Optoelect Mat & Technol, Guangzhou Campus, Guangzhou 510275, Guangdong, Peoples R China

[3] Foshan Univ, Sch Phys & Optoelect Engn, Foshan 528000, Peoples R China

[4] Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia

来源：

ANNALS OF PHYSICS | 2018年 / 388卷

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

Ultracold atom; Artificial gauge field; Band-gap structure; Chiral discrete soliton; MAGNETIC-FIELDS; ULTRACOLD ATOMS; EDGE STATES; QUANTUM; FERMIONS; WAVES; PHASE;

D O I：

10.1016/j.aop.2017.11.008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study three-leg-ladder optical lattices loaded with repulsive atomic Bose-Einstein condensates and subjected to artificial gauge fields. By employing the plane-wave analysis and variational approach, we analyze the band-gap structure of the energy spectrum and reveal the exotic swallow-tail loop structures in the energy level anti-crossing regions due to an interplay between the atom atom interaction and artificial gauge field. In further, we discover stable discrete solitons residing in the forbidden zone above the maxima of the highest band, and we find that these discrete soli tons are associated with chiral edge currents. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：173 / 185

页数：13

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