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arXiv 0807.0586hep-th
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退化和临界Bloch膜

Degenerate and critical Bloch branes

A. de Souza Dutra, A. C. Amaro de Faria, M. Hott

摘要:

在过去的几年里,许多研究报道了具有内部结构的厚膜的出现,这是由控制耦合到(4,1)维引力的两个标量场之间相互作用的参数引起的,在具有一个额外维度的弯曲时空中。在这里,我们表明,可以实现控制膜的厚度,而不需要改变潜在的参数。相反,这将通过改变与畴壁简并度相关的参数来实现。我们还报告了存在新的和定性不同的解决方案的退化参数的临界值,这可以被称为临界布洛赫膜。

英文摘要:

In the last few years a number of works reported the appearance of thick branes with internal structure, induced by the parameter which controls the interaction between two scalar fields coupled to gravity in (4,1) dimensions in warped space-time with one extra dimension. Here we show that one can implement the control over the brane thickness without needing to change the potential parameter. On the contrary, this is going to be done by means of the variation of a parameter associated to the domain wall degeneracy. We also report the existence of novel and qualitatively different solutions for a critical value of the degeneracy parameter, which could be called critical Bloch branes.

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