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Traversable wormholes in f(R) gravity with constant and variable redshift functions
New Astronomy ( IF 1.9 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.newast.2020.101399
Nisha Godani , Gauranga C. Samanta

Abstract 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 − μ R c ( R R c ) p , where R is scalar curvature, μ, Rc and p are constants with μ, Rc > 0 and 0 Amendola et al., 2007a ). 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 ) = 1 r and (ii) ϕ ( r ) = c (constant) with b ( r ) = r e x p ( r − r 0 ) (Samanta et al., 2018). Further, the regions respecting the energy conditions are investigated.

中文翻译:

具有恒定和可变红移函数的 f(R) 引力中的可穿越虫洞

摘要 本文旨在研究 f(R) 引力中可穿越的虫洞,其中一个可行的 f(R) 函数定义为 f ( R ) = R − μ R c ( RR c ) p ,其中 R 是标量曲率, μ、Rc 和 p 是常数,其中 μ、Rc > 0 和 0 Amendola 等人,2007a)。虫洞的度量取决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作用。在这项工作中,虫洞解被确定为 (i) ϕ ( r ) = 1 r 和 (ii) ϕ ( r ) = c (constant) 且 b ( r ) = rexp ( r − r 0 ) (Samanta et al ., 2018)。此外,研究了与能量条件相关的区域。
更新日期:2020-10-01
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