Dynamics of dark solitons in elongated Bose-Einstein condensates

Details Dynamics of dark solitons in elongated Bose-Einstein condensates Dynamics of dark solitons in elongated Bose-Einstein condensates

2001-11-27

arxiv.org/abs/cond-mat/0111506v1

Physics

Condensed Matter

Statistical Mechanics

~ 5 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.89.110401

We find two types of moving dark soliton textures in elongated Bose-Einstein condensates: non-stationary kinks and proper dark solitons. The former have a curved notch region and rapidly decay by emitting phonons and/or proper dark solitons. The proper moving solitons are characterized by a flat notch region and we obtain the diagram of their dynamical stability. At finite temperatures the dynamically stable solitons decay due to the thermodynamic instability. We develop a theory of their dissipative dynamics and explain experimental data.

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