Vector gap solitons of spin-orbit-coupled Bose-Einstein condensate in honeycomb optical lattices

Meng, Hongjuan; Wang, Jing; Fan, Xiaobei; Wang, Qingqing; Shao, Kaihua; Zhao, Yuexin; Wang, Wenyuan; Shi, Yuren

doi:10.1103/physreve.108.034215

Cited by 4 publications

(1 citation statement)

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“…In recent years, experiments to realize SOC-BEC in multicomponent 87 Rb condensates have stimulated a great deal of research on solitons and nonlinear waves [20,21]. A variety of matter-wave solitons exist in SOC-BEC [22], such as bright solitons [23][24][25][26], dark solitons [27,28], stripe solitons [13,29], surface solitons [30], dark-bright complex solitions [31], vortices [32,33], and vortex-antivortex dipoles [34]. Xu et al investigated interstitial solitons in SOC-BEC with a dichromatic optical lattice [22].…”

Section: Introductionmentioning

confidence: 99%

Vector gap solitons of spin-orbit-coupled Bose-Einstein condensate in square optical lattice

Wang,

Tu,

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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Vector gap solitons in quasi-two-dimensional Bose-Einstein condensate loaded in a square optical lattice with spin-orbit and Rabi coupling are investigated theoretically. The solitons are obtained by the Newton-Conjugate Gradient method for various physical parameters. The stability properties of gap solitons are theoretically analyzed by direct nonlinear dynamical evolution. It is found that the existence of gap solitons is sensitive to the spin-orbit and Rabi coupling strength. Smaller Rabi coupling strength is beneﬁcial for the excitation of solitons in the semi-inﬁnite gap. Conversely, larger Rabi coupling strength is beneﬁcial for the soliton excitation in the ﬁrst gap. The dynamical stability of these gap solitons depends on the spin-orbit and Rabi coupling strength, and the location of the soliton in the bandgap. These ﬁndings may contribute to understanding the topological excitations in condensed matter systems.

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