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arXiv 1002.1932hep-thmath-phmath.MP
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大质量非线性S^N-西格玛模型中的孤立波

Solitary Waves in Massive Nonlinear S^N-Sigma Models

A. Alonso Izquierdo, M. Á. González León, M. de la Torre Mayado

摘要:

揭示了大质量(1+1)维非线性S^N-西格玛模型的孤波现象.结果表明,这些系统中的孤立波与N维排斥Neumann力学问题中的分界线轨迹是一一对应的。有拓扑(异宿轨线)和非拓扑(同宿轨线)扭结。一些嵌入sine-Gordon扭结的稳定性进行了讨论,通过直接估计的二阶波动算子周围的频谱,而其他拓扑和非拓扑扭结的不稳定性建立应用Morse指数定理。

英文摘要:

The solitary waves of massive (1+1)-dimensional nonlinear S^N-sigma models are unveiled. It is shown that the solitary waves in these systems are in one-to-one correspondence with the separatrix trajectories in the repulsive N-dimensional Neumann mechanical problem. There are topological (heteroclinic trajectories) and non-topological (homoclinic trajectories) kinks. The stability of some embedded sine-Gordon kinks is discussed by means of the direct estimation of the spectra of the second-order fluctuation operators around them, whereas the instability of other topological and non-topological kinks is established applying the Morse index theorem.

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