中国物理B ›› 2019, Vol. 28 ›› Issue (12): 126701-126701.doi: 10.1088/1674-1056/ab4e8a

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Accelerate Bose-Einstein condensate by interaction

Jie-Li Qin(秦杰利)   

  1. School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China
  • 收稿日期:2019-05-09 修回日期:2019-09-04 出版日期:2019-12-05 发布日期:2019-12-05
  • 通讯作者: Jie-Li Qin E-mail:104531@gzhu.edu.cn,qinjieli@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11847059 and 11904063).

Accelerate Bose-Einstein condensate by interaction

Jie-Li Qin(秦杰利)   

  1. School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China
  • Received:2019-05-09 Revised:2019-09-04 Online:2019-12-05 Published:2019-12-05
  • Contact: Jie-Li Qin E-mail:104531@gzhu.edu.cn,qinjieli@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11847059 and 11904063).

摘要: In recent years, accelerating waves have attracted great research interests both due to their unique properties and tempting applications. Here we investigate the effect of the inter-particle interaction on accelerating of Bose-Einstein condensate (BEC). We show that spatially homogeneous interactions will have no accelerating effect on BEC regardless of the interaction form (contact, dipole-dipole, or any others). But spatially inhomogeneous interactions may lead to an accelerating motion of the condensate. As an example, the accelerating dynamic of BEC under a spatially linear modulated contact interaction is studied in detail. It is found that such an interaction will accelerate the condensate with a time varying acceleration. Furthermore, an interaction engineering scheme to achieve constantly accelerating BEC is proposed and studied numerically. Numerical results suggest that this engineering scheme can also suppress profile changing of the condensate during its evolution, thus realize an accelerating profile-keeping matter wave packet. Our analysis also applies to optical waves with Kerr nonlinearity.

关键词: Bose-Einstein condensate, interaction, acceleration

Abstract: In recent years, accelerating waves have attracted great research interests both due to their unique properties and tempting applications. Here we investigate the effect of the inter-particle interaction on accelerating of Bose-Einstein condensate (BEC). We show that spatially homogeneous interactions will have no accelerating effect on BEC regardless of the interaction form (contact, dipole-dipole, or any others). But spatially inhomogeneous interactions may lead to an accelerating motion of the condensate. As an example, the accelerating dynamic of BEC under a spatially linear modulated contact interaction is studied in detail. It is found that such an interaction will accelerate the condensate with a time varying acceleration. Furthermore, an interaction engineering scheme to achieve constantly accelerating BEC is proposed and studied numerically. Numerical results suggest that this engineering scheme can also suppress profile changing of the condensate during its evolution, thus realize an accelerating profile-keeping matter wave packet. Our analysis also applies to optical waves with Kerr nonlinearity.

Key words: Bose-Einstein condensate, interaction, acceleration

中图分类号:  (Ultracold gases, trapped gases)

  • 67.85.-d
03.67.Bg (Entanglement production and manipulation) 05.30.Jp (Boson systems)