外文题目: Dark soliton pair of ultracold Fermi gases for a generalized Gross-Pitaevskii equation model
作者: Wang, Ying; Zhou, Yu; Zhou, Shuyu; Zhang, Yongsheng
刊名: Phys. Rev. E
年: 2016 卷: 94 期: 1 文章编号：12225
英文关键词:

BOSE-EINSTEIN CONDENSATE; NONLINEAR SCHRODINGER-EQUATION; VARIABLE-COEFFICIENTS; PULSES; FIBERS
英文摘要:
We present the theoretical investigation of dark soliton pair solutions for one-dimensional as well as three-dimensional generalized Gross-Pitaevskii equation (GGPE) which models the ultracold Fermi gas during Bardeen-Cooper-Schrieffer-Bose-Einstein condensates crossover. Without introducing any integrability constraint and via the self-similar approach, the three-dimensional solution of GGPE is derived based on the one-dimensional dark soliton pair solution, which is obtained through a modified F-expansion method combined with a coupled modulus-phase transformation technique. We discovered the oscillatory behavior of the dark soliton pair from the theoretical results obtained for the three-dimensional case. The calculated period agrees very well with the corresponding reported experimental result [Weller et al., Phys. Rev. Lett. 101, 130401 (2008)], demonstrating the applicability of the theoretical treatment presented in this work.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1103/PhysRevE.94.012225


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