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arXiv 2004.14209gr-qc
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具有常数和可变红移函数的$f(R)$引力中的可穿越虫洞

Traversable wormholes in $f(R)$ gravity with constant and variable redshift functions

Nisha Godani, Gauranga C. Samanta

摘要:

本文研究了$f(R)$引力中的可穿越虫洞,定义了一个可行的$f(R)$函数$f(R)=R-μR_c\Big(\frac{R}{R_c}\Big)^p$,其中$R$是标量曲率,$μ$,$R_c$和$p$是常数,而$μ, R_c>0$和$0<p<1$是\citep{Amendola} .虫洞的度量依赖于表征其性质的形状函数$b(r)$和红移函数$ϕ(r)$,因此形状函数和红移函数在虫洞建模中起着重要的作用。在这项工作中,虫洞的解决方案确定(i)$ϕ(r)=\frac{1}{r}$和(ii)$ϕ(r)=c$(常数)与$b(r)=\frac{r}{exp(r-r_0)}$ \citep{godani1}。此外,区域尊重的能量条件进行了研究。

英文摘要:

The present paper is aimed at the study of traversable wormholes in $f(R)$ gravity with a viable $f(R)$ function defined as $f(R)=R-μR_c\Big(\frac{R}{R_c}\Big)^p$, where $R$ is scalar curvature, $μ$, $R_c$ and $p$ are constants with $μ, R_c>0$ and $0<p<1$ \citep{Amendola}. The metric of wormhole is dependent on shape function $b(r)$ and redshift function $ϕ(r)$ which characterize its properties, so the shape function and redshift function play an important role in wormhole modeling. In this work, the wormhole solutions are determined for (i) $ϕ(r)=\frac{1}{r}$ and (ii) $ϕ(r)=c$ (constant) with $b(r)=\frac{r}{exp(r-r_0)}$ \citep{godani1}. Further, the regions respecting the energy conditions are investigated.

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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