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arXiv 2008.07327gr-qc
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修正Gauss-Bonnet引力下的静态虫洞解和Noether对称性

Static Wormhole Solutions and Noether Symmetry in Modified Gauss-Bonnet Gravity

M. Sharif, Iqra Nawazish, Shahid Hussain

摘要:

本文利用改进的Gauss-Bonnet引力$f(\mathcal{G})$理论(其中$\mathcal{G}$代表Gauss-Bonnet项)中的Noether对称性技术分析了静态可穿越虫洞。我们假设各向同性的物质配置和球对称度规。我们构造了三个$f(\mathcal{G})$模型,即线性、二次和指数形式,并检验了这些模型的一致性。通过有效应力-能量张量的零能量界讨论了虫洞解的可穿越性,通过各向同性流体的标准能量界研究了虫洞解的物理行为。我们还讨论了这些虫洞内的虫洞喉的稳定性,并得出结论,存在的遍历和物理稳定的二次以及指数$f(\mathcal{G})$模型的虫洞。

英文摘要:

In this paper, we analyze static traversable wormholes via Noether symmetry technique in modified Gauss-Bonnet $f(\mathcal{G})$ theory of gravity (where $\mathcal{G}$ represents Gauss-Bonnet term). We assume isotropic matter configuration and spherically symmetric metric. We construct three $f(\mathcal{G})$ models, i.e, linear, quadratic and exponential forms and examine the consistency of these models. The traversable nature of wormhole solutions is discussed via null energy bound of the effective stress-energy tensor while physical behavior is studied through standard energy bounds of isotropic fluid. We also discuss the stability of these wormholes inside the wormhole throat and conclude the presence of traversable and physically stable wormholes for quadratic as well as exponential $f(\mathcal{G})$ models.

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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