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arXiv · 1610.03679

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

Qinzhou Ye·Xizhou Qin·Yongyao Li·Honghua Zhong·Yuri S. Kivshar·Chaohong Lee
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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.

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Qinzhou Ye, Xizhou Qin, Yongyao Li, Honghua Zhong, Yuri S. Kivshar, Chaohong Lee. 2016-10-12. Band-gap structure and chiral discrete solitons in optical lattices with artificial gauge fields. https://arxiv.org/abs/1610.03679

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