论文标题
高阶相互作用在周期性光学晶格中的Bose-Einstein冷凝物的模量不稳定性中的作用
Role of higher-order interactions on the modulational instability of Bose-Einstein condensate trapped in a periodic optical lattice
论文作者
论文摘要
在本文中，我们研究了高阶相互作用对浸入光学晶格电位的玻色烯凝结物（BEC）的模量不稳定性（MI）的影响。我们为振幅的时间演变，调节扰动的阶段以及系统的有效潜力得出了新的变分方程。通过有效的潜在技术，我们发现高密度有吸引力和令人反感的BEC具有新的特征，对MI现象有直接影响。提出了密集数值研究的结果，并提出了它们与上述半分析方法的收敛性。
In this paper, we investigate the impact of higher-order interactions on the modulational instability (MI) of Bose-Einstein Condensates (BECs) immersed in an optical lattice potential. We derive the new variational equations for the time evolution of amplitude, phase of modulational perturbation, and effective potential for the system. Through effective potential techniques, we find that high density attractive and repulsive BECs exhibit new character with direct impact over the MI phenomenon. Results of intensive numerical investigations are presented and their convergence with the above semi analytical approach is brought out.
