方形光晶格中自旋轨道耦合玻色-爱因斯坦凝聚态的矢量间隙孤子

IF 1.5 4区 物理与天体物理 Q3 OPTICS Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-03-12 DOI:10.1088/1361-6455/ad2e2c
Qingqing Wang, Pu Tu, Jinping Ma, Kaihua Shao, Xi Zhao, Baolong Xi, Yan Song, Yuren Shi
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摘要

本文从理论上研究了装载在具有自旋轨道和拉比耦合的方形光学晶格中的准二维玻色-爱因斯坦凝聚态的矢量间隙孤子。通过牛顿-共轭-梯度法获得了不同物理参数下的孤子。通过直接非线性动力学演化,从理论上分析了间隙孤子的稳定性。研究发现,间隙孤子的存在对自旋轨道和拉比耦合强度很敏感。较小的拉比耦合强度有利于在半无限间隙中激发孤子。相反,较大的拉比耦合强度有利于在第一间隙中激发孤子。这些间隙孤子的动力学稳定性取决于自旋轨道和拉比耦合强度,以及孤子在带隙中的位置。这些发现可能有助于理解凝聚态系统中的拓扑激发。
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Vector gap solitons of spin-orbit-coupled Bose-Einstein condensate in square optical lattice
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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来源期刊
CiteScore
3.60
自引率
6.20%
发文量
182
审稿时长
2.8 months
期刊介绍: Published twice-monthly (24 issues per year), Journal of Physics B: Atomic, Molecular and Optical Physics covers the study of atoms, ions, molecules and clusters, and their structure and interactions with particles, photons or fields. The journal also publishes articles dealing with those aspects of spectroscopy, quantum optics and non-linear optics, laser physics, astrophysics, plasma physics, chemical physics, optical cooling and trapping and other investigations where the objects of study are the elementary atomic, ionic or molecular properties of processes.
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