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arXiv 2004.05121gr-qcastro-ph.HEhep-th
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具有$U(1)$对称性破缺的新厚膜解

Novel thick brane solutions with $U(1)$ symmetry breaking

Marzieh Peyravi, Nematollah Riazi, Francisco S. N. Lobo

摘要:

在这项工作中,使用两个标量场($ϕ$,$ψ$)耦合到4+1维引力,我们构造新的拓扑膜解通过一个明确的$U(1)$对称性破缺项。该模型的势被构造成使得在$ϕ$场中存在两个不同的简并真空,类似于$ϕ^{4}$势。因此,由于$ϕ$场的真空结构而出现膜解。然而,在$ψ$方向上的拓扑和真空结构依赖于对称性破缺参数$β^{2}$,这导致不同类型的膜。因此,我们可以将本模型解释为$ϕ^{4}$膜与辅助场的组合,这导致了与$ϕ^{4}$系统的偏离,膜实现了更丰富的内部结构。此外,我们详细分析了超势,翘曲因子,Ricci和Kretschmann标量和爱因斯坦张量分量的行为。除此之外,我们还探讨了膜在模型自由参数下的稳定性。这里提出的分析补充了以前的工作,是足够新颖的有趣。

英文摘要:

In this work, using two scalar fields ($ϕ$, $ψ$) coupled to 4+1 dimensional gravity, we construct novel topological brane solutions through an explicit $U(1)$ symmetry breaking term. The potential of this model is constructed so that two distinct degenerate vacua in the $ϕ$ field exist, in analogy to the $ϕ^{4}$ potential. Therefore, brane solutions appear due to the vacuum structure of the $ϕ$ field. However, the topology and vacuum structure in the $ψ$ direction depends on the symmetry breaking parameter $β^{2}$, which leads to different types of branes. As a result, one can interpret the present model as a combination of a $ϕ^{4}$ brane with an auxiliary field, which leads to deviations from the $ϕ^{4}$ system with the brane achieving a richer internal structure. Furthermore, we analyse in detail the behaviour of the superpotentials, the warp factors, the Ricci and Kretschmann scalars and the Einstein tensor components. In addition to this, we explore the stability of the brane in terms of the free parameters of the model. The analysis presented here complements previous work and is sufficiently novel to be interesting.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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