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arXiv:1610.03679 · Annals of Physics

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

Published Nov 26, 2017• 11 citations
arXivHTMLPDF
DOI
10.1016/j.aop.2017.11.008

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Abstract. We study mobility and interaction of gap solitons in a Bose-Einstein condensate (BEC) confined by an optical lattice potential. Such localized wavepackets can exist only in the gaps of the matter-wave band-gap spectrum and their interaction properties are shown to serve as a measure of discreteness imposed onto a BEC by the lattice potential. We show that inelastic collisions of two weakly localized nearthe-band-edge gap solitons provide simple and effective means for generating strongly localized in-gap solitons through soliton fusion.