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arXiv 0807.4442hep-phastro-phgr-qchep-th
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具有结的畴壁网络动力学

Dynamics of domain wall networks with junctions

P. P. Avelino, C. J. A. P. Martins, J. Menezes, R. Menezes, J. C. R. E. Oliveira

摘要:

我们使用的分析工具和广泛的一套最大的和最准确的三维场论数值模拟相结合,研究畴壁网络与结的动力学。我们建立在我们以前的工作,并考虑一类模型,在大量的$N$耦合标量场的限制,接近所谓的“理想”模型(在其潜在的网络挫折)。我们考虑N=2和N=20之间的$N$的值,以及一系列的宇宙学时代,我们还比较了这类模型与其他玩具模型在过去使用。在所有情况下,我们都发现了令人信服的证据,证明了逐步扩展的方法,强烈支持了我们的无挫折猜想。我们还讨论了各种可能的类型的路口(包括有层次的情况下,他们)和他们的角色在网络的动态。最后,我们修正了Zel'dovich界限,并提供了一个更新的宇宙学界限的能量尺度的这种类型的缺陷网络:它必须低于$10 {\rm keV}$。

英文摘要:

We use a combination of analytic tools and an extensive set of the largest and most accurate three-dimensional field theory numerical simulations to study the dynamics of domain wall networks with junctions. We build upon our previous work and consider a class of models which, in the limit of large number $N$ of coupled scalar fields, approaches the so-called `ideal' model (in terms of its potential to lead to network frustration). We consider values of $N$ between N=2 and N=20, and a range of cosmological epochs, and we also compare this class of models with other toy models used in the past. In all cases we find compelling evidence for a gradual approach to scaling, strongly supporting our no-frustration conjecture. We also discuss the various possible types of junctions (including cases where there is a hierarchy of them) and their roles in the dynamics of the network. Finally, we revise the Zel'dovich bound and provide an updated cosmological bound on the energy scale of this type of defect network: it must be lower than $10 {\rm keV}$.

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