Properties of Two-Component Bose–Einstein Condensates with Monopolar Interaction

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• 作者：Jinbin Li ; Yaxin Qiao
• 关键词：BEC ; Phase separation ; GP equations ; DFM variational principle
• 刊名：Journal of Low Temperature Physics
• 出版年：2014
• 出版时间：November 2014
• 年：2014
• 卷：177
• 期：3-4
• 页码：165-177
• 全文大小：405 KB
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• 作者单位：Jinbin Li (1)
  Yaxin Qiao (2) (3)
  
  1. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing?, 211106, People’s Republic of China
  2. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing?, 211106, People’s Republic of China
  3. Department of Reactor Engineering Research and Design, China Institute of Atomic Energy, Beijing?, 102413, People’s Republic of China
  
• ISSN：1573-7357

文摘

We study two-component Bose–Einstein condensates (BECs) with electromagnetically induced attractive monopolar interaction, by means of the Dirac–Frenkel–McLachlan variational principle. The effectiveness of external trap potential, inter-component \(s\) -wave scattering, monopolar interaction, and particle numbers on the density of BECs is investigated. It is shown that the trap potential dramatically affects density profiles compared to the other three ingredients. Atoms with smaller intra-component \(s\) -wave scattering length will be squeezed out when monopolar interaction or particle numbers are small, whereas the atoms in the other component are pushed out instead when either parameter is large enough. This is in contrast to modulation of inter-component \(s\) -wave scattering length, which can not exchange the relative location of different components.