中国物理B ›› 2017, Vol. 26 ›› Issue (1): 13401-013401.doi: 10.1088/1674-1056/26/1/013401

• SPECIAL TOPIC—Soft matter and biological physics (Review) • 上一篇    下一篇

Energy sharing induced by the nonlinear interaction

Yuan Liu(刘渊), Zhifang Feng(冯志芳), Weidong Li(李卫东)   

  1. 1. Physics Department of College of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China;
    2. Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2016-06-27 修回日期:2016-09-02 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: Weidong Li E-mail:wdli@sxu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11374197), the Research Fund for the Doctoral Program of TYUST, China (Grant No. 20122041), and the Program for Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT13076).

Energy sharing induced by the nonlinear interaction

Yuan Liu(刘渊)1, Zhifang Feng(冯志芳)1, Weidong Li(李卫东)2   

  1. 1. Physics Department of College of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China;
    2. Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China
  • Received:2016-06-27 Revised:2016-09-02 Online:2017-01-05 Published:2017-01-05
  • Contact: Weidong Li E-mail:wdli@sxu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11374197), the Research Fund for the Doctoral Program of TYUST, China (Grant No. 20122041), and the Program for Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT13076).

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摘要：

Strong energy sharing is shown by numerically investigating coupled multi-component Bose-Einstein condensates (BECs) with a harmonic trap to simulate the Fermi-Pasta-Ulam model (FPU). For two-component BECs, the energy exchanging between each part, from regular, quantum beating to complete energy sharing, is explored by simulating their Husimi distributions, the time evolution of energies and the statistical entropy. Meanwhile, in the three-component case, a more complex energy sharing behavior is reported and a strong energy sharing is found.

关键词: Bose-Einstein condensates, Fermi-Pasta-Ulam model, Husimi distributions, statistical entropy

Abstract:

Strong energy sharing is shown by numerically investigating coupled multi-component Bose-Einstein condensates (BECs) with a harmonic trap to simulate the Fermi-Pasta-Ulam model (FPU). For two-component BECs, the energy exchanging between each part, from regular, quantum beating to complete energy sharing, is explored by simulating their Husimi distributions, the time evolution of energies and the statistical entropy. Meanwhile, in the three-component case, a more complex energy sharing behavior is reported and a strong energy sharing is found.

Key words: Bose-Einstein condensates, Fermi-Pasta-Ulam model, Husimi distributions, statistical entropy

中图分类号:  (Elastic; ultracold collisions)

  • 34.50.Cx
05.30.Jp (Boson systems) 05.45.Pq (Numerical simulations of chaotic systems)