Dark soliton beats in the time-varying background of Bose-Einstein condensates
- Tianmu College, Zhejiang Forestry University, Lin'an 311300 (China)
- Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006 (China)
- Institute of Nonlinear Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004 (China)
We investigate the dynamics of dark solitons in one-dimensional Bose-Einstein condensates. In the large particle limit, by introducing the lens-type transformation, we find that the macroscopic wave function evolves self-similarly when its initial profile strays from that of the equilibrium state, which provides a time-varying background for the propagation of dark solitons. The interaction of dark solitons with this kind of background is studied both analytically and numerically. We find that the center-of-mass motion of the dark soliton is deeply affected by the time-varying background, and the beating phenomena of dark soliton emerge when the intrinsic frequency of the dark soliton approaches that of the background. Lastly, we investigate the propagation of dark solitons in the freely expanding background.
- OSTI ID:
- 21313315
- Journal Information:
- Physical Review. A, Vol. 80, Issue 1; Other Information: DOI: 10.1103/PhysRevA.80.013617; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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