Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Godani, Nisha"'
Autor:
Capozziello, Salvatore, Godani, Nisha
We consider Non-local Gravity in view to obtain stable and traversable wormhole solutions. In particular, the class of Non-local Integral Kernel Theories of Gravity, with the inverse d'Alembert operator in the gravitational action, is taken into acco
Externí odkaz:
http://arxiv.org/abs/2211.06481
Autor:
Godani, Nisha, Samanta, Gauranga C.
Publikováno v:
Annals of Physics, 429 (2021) 168460
The present paper is intended for studying the effect of strong gravitational lensing in the context of charged wormhole. To study this effect, the conditions determining the existence of photon spheres at and outside the throat are obtained. The nec
Externí odkaz:
http://arxiv.org/abs/2105.08517
Autor:
Godani, Nisha, Samanta, Gauranga C
In this paper, we considered the study of Friedmann-Robertson-Walker (FRW) model in the framework of $f(Q,T)$ gravity, an extension of symmetric teleparallel gravity, recently defined by Y. Xu et al. \cite{Xu}. The non-linear model $f(Q,T)=-\alpha Q-
Externí odkaz:
http://arxiv.org/abs/2105.01546
Autor:
Godani, Nisha, Samanta, Gauranga C.
In the present paper, we have investigated the Friedmann Robertson Walker (FRW) model in viable $f(R,T)$ gravity with $f(R,T)$ function proposed as $f(R,T)=R +\xi T^{1/2}$, where $\xi$ is an arbitrary constant, $R$ is the scalar curvature and $T$ is
Externí odkaz:
http://arxiv.org/abs/2005.11156
Autor:
Godani, Nisha, Samanta, Gauranga C.
Publikováno v:
International Journal of Modern Physics A, 35 (2020) 2050045
Morris and Thorne \cite{morris1} proposed traversable wormholes, hypothetical connecting tools, using the concept of Einstein's general theory of relativity. In this paper, the modification of general relativity (in particular $f(R,T)$ theory of grav
Externí odkaz:
http://arxiv.org/abs/2005.01132
Autor:
Godani, Nisha, Samanta, Gauranga C.
Publikováno v:
New Astronomy, 80 (2020) 101399
The present paper is aimed at the study of traversable wormholes in $f(R)$ gravity with a viable $f(R)$ function defined as $f(R)=R-\mu R_c\Big(\frac{R}{R_c}\Big)^p$, where $R$ is scalar curvature, $\mu$, $R_c$ and $p$ are constants with $\mu, R_c>0$
Externí odkaz:
http://arxiv.org/abs/2004.14209
Autor:
Godani, Nisha, Samanta, Gauranga C.
In this work, the study of traversable wormholes in $f(R)$ gravity with the function $f(R)=R+\alpha R^n$, where $\alpha$ and $n$ are arbitrary constants, is taken into account. The shape function $b(r)=\frac{r}{\exp(r-r_0)}$, proposed by Samanta et a
Externí odkaz:
http://arxiv.org/abs/2001.00010
Autor:
Godani, Nisha, Samanta, Gauranga C.
Traversable wormholes, studied by Morris and Thorne \cite{Morris1} in general relativity, are investigated in this research paper in $f(R,T)$ gravity by introducing a new form of non-linear $f(R,T)$ function. By using this novel function, the Einstei
Externí odkaz:
http://arxiv.org/abs/1909.07787
Autor:
Samanta, Gauranga C, Godani, Nisha
Publikováno v:
Eur. Phys. J. C (2019) 79: 623
In this work, wormholes, tunnel like structures introduced by Morris \& Thorne \cite{Morris95}, are explored within the framework of $f(R)$ gravity. Using the shape function $b(r)=r_0\big(\frac{r}{r_0}\big)^\gamma$, where $0<\gamma<1$, and the equati
Externí odkaz:
http://arxiv.org/abs/1908.04406