Dynamical stability of dipolar condensate in a parametrically modulated one-dimensional optical lattice

• 作者: Ji-Li Ma Xiao-Xun Li Rui-Jin Cheng Ai-Xia Zhang Ju-Kui Xue
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: GENERAL
• 页码范围: 161-167
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd746

摘要

We study the stabilization properties of dipolar Bose-Einstein condensate in a deep one-dimensional optical lattice with an additional external parametrically modulated harmonic trap potential.Through both analytical and numerical methods,we solve a dimensionless nonlocal nonlinear discrete Gross-Pitaevskii equation with both the short-range contact interaction and the long-range dipole-dipole interaction.It is shown that,the stability of dipolar condensate in modulated deep optical lattice can be controled by coupled effects of the contact interaction,the dipolar interaction and the external modulation.The system can be stabilized when the dipolar interaction,the contact interaction,the average strength of potential and the ratio of amplitude to frequency of the modulation satisfy a critical condition.In addition,the breather state,the diffused state and the attractive-interaction-induced-trapped state are predicted.The dipolar interaction and the external modulation of the lattice play important roles in stabilizing the condensate.