Thick branes with inner structure in mimetic gravity

Thick branes with inner structure in mimetic gravity
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模拟重力下具有内部结构的厚膜

DOI:
10.1140/epjc/s10052-018-5527-4
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发表时间:
2017-11
影响因子:
4.4
通讯作者:
Liu Yu-Xiao
Liu Yu-Xiao
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhong Yi;Zhong Yuan;Zhang Yu-Peng;Liu Yu-Xiao

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本文研究了拟纯量场产生的厚膜。构造了三种典型的厚膜模型,分析了线性张量扰动和标量扰动。这些膜具有不同的内部结构,其中一些在广义相对论中是不存在的。对于每个膜模型,解在张量和标量扰动下都是稳定的。张量零模局域在膜上,而标量微扰不传播,也不局域在膜上。当膜分裂成多个子膜时,张量微扰的势也分裂成多阱,这可能导致张量微扰共振和物质场局域化的新现象.
In this paper, thick branes generated by mimetic scalar field are investigated. Three typical thick brane models are constructed and the linear tensor and scalar perturbations are analyzed. These branes have different inner structures, some of which are absent in general relativity. For each brane model, the solution is stable under both tensor and scalar perturbations. The tensor zero modes are localized on the branes, while the scalar perturbations do not propagate and they are not localized on the brane. As the branes split into multi sub-branes for specific parameters, the potentials of the tensor perturbations also split into multi-wells, and this may lead to new phenomenon in the resonance of the tensor perturbation and the localization of matter fields.
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