Landau dynamics of a grey soliton in a trapped condensate.
Landau dynamics of a grey soliton in a trapped condensate.
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DOI：
10.1103/physrevlett.93.240403
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发表时间：
2004-08
影响因子：
8.6
通讯作者：
V. Konotop;L. Pitaevskiĭ
中科院分区：
文献类型：
--
作者：
V. Konotop;L. Pitaevskiĭ
结果表明，一维阱中的灰孤子动力学可以在局域密度近似的框架内看作准粒子的朗道动力学。一个具有任意振幅的孤子在俘获势中运动，而其密度曲线作为一个质量为2m的粒子不会发生变形。局部密度近似中的动力学与暗孤子的微扰理论一致。定性地讨论了捕集器中涡流环的动力学。
It is shown that grey soliton dynamics in a one-dimensional trap can be treated within the framework of the local density approximation as Landau dynamics of a quasiparticle. A soliton of arbitrary amplitude moves in the trapping potential without deformation of its density profile as a particle of mass 2m. The dynamics in the local density approximation is shown to be consistent with the perturbation theory for dark solitons. Dynamics of a vortex ring in a trap is discussed qualitatively.