Band-gap structure and chiral discrete solitons in optical lattices with artificial gauge fields
Quantum Gases
2016-10-13 v1
Abstract
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. Also, we discover stable discrete solitons residing in a semi-infinite gap above the highest band, these discrete solitons are associated with the chiral edge currents.
Keywords
Cite
@article{arxiv.1610.03679,
title = {Band-gap structure and chiral discrete solitons in optical lattices with artificial gauge fields},
author = {Qinzhou Ye and Xizhou Qin and Yongyao Li and Honghua Zhong and Yuri S. Kivshar and Chaohong Lee},
journal= {arXiv preprint arXiv:1610.03679},
year = {2016}
}