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arXiv 1702.00701math.APmath-phmath.MPnlin.PS
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耦合Gross-Pitaevskii系统畴壁的轨道稳定性

Orbital Stability of Domain Walls in Coupled Gross-Pitaevskii Systems

Andres Contreras, Dmitry E. Pelinovsky, Michael Plum

摘要:

对于具有无穷远非平凡边界条件的耦合一维Gros-Pitaevskii系统,域壁是能量最小化器。证明了这些解在无穷远处具有相同极限的复$\dot{H}^1$函数空间中是轨道稳定的。在本工作中,我们采用了一种新的加权$H^1$空间来控制畴壁的扰动,从而获得一个改进的轨道稳定性的结果。一个主要的困难来自于线性化算子在畴壁的退化和不连续性的缺乏。

英文摘要:

Domain walls are minimizers of energy for coupled one-dimensional Gross--Pitaevskii systems with nontrivial boundary conditions at infinity. It has been shown that these solutions are orbitally stable in the space of complex $\dot{H}^1$ functions with the same limits at infinity. In the present work we adopt a new weighted $H^1$ space to control perturbations of the domain walls and thus to obtain an improved orbital stability result. A major difficulty arises from the degeneracy of linearized operators at the domain walls and the lack of coercivity.

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