Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Manna, Goutam"'
This study presents an algebraic framework to explore the fundamental relationship between gravity and quantum mechanics, with particular emphasis on the role of primordial black holes (PBHs) in cosmology. Through the concept of self-gravitating cond
Externí odkaz:
http://arxiv.org/abs/2411.11047
In this work, we investigate the particle creation rate in a dynamical (Vaidya) spacetime using Feynman's path integral formalism within the framework of the effective action approach. We analyze particle production rates in the region of dynamical h
Externí odkaz:
http://arxiv.org/abs/2410.12436
Publikováno v:
Physics of the Dark Universe, 2024
This work comprises a study of the thermodynamic behavior of modified $f(\bar{R},\bar{T})$ gravity, which had been developed based on a non-canonical theory known as K-essence theory. In this development, we use the Dirac-Born-Infeld (DBI) type of no
Externí odkaz:
http://arxiv.org/abs/2406.17301
Publikováno v:
Fortschritte der Physik, 2024
We show that the Raychaudhuri equation remains form invariant for certain solutions of scalar fields $\phi$ whose Lagrangian is non-canonical and of the form $\mathcal{L}(X,\phi)=-V(\phi)F(X)$, with $X=\frac{1}{2} g_{\mu\nu} \nabla^{\mu}\phi \nabla^{
Externí odkaz:
http://arxiv.org/abs/2404.11632
In this work, we develop the Raychaudhuri equation in $f(\bar{R},\bar{T})$ gravity in the setting of a non-canonical theory, namely K-essence theory. We solve the modified Raychaudhuri equation for the additive form of $f(\bar{R},\bar{T})$, which is
Externí odkaz:
http://arxiv.org/abs/2402.18431
Based on the work of Chandrasekhar [{\it The Mathematical Theory of Black Holes, Oxford Univ. Press (1992)}], we investigate the null geodesic structure of the emergent Barriola-Vilenkin spacetime in the context of {\bf k-}essence theory. For {\bf k-
Externí odkaz:
http://arxiv.org/abs/2401.17572
This article investigates on the radial and non-radial geodesic structures of the generalized K-essence Vaidya spacetime. Within the framework of K-essence geometry, it is important to note that the metric does not possess conformal equivalence to th
Externí odkaz:
http://arxiv.org/abs/2311.03423
The paper investigates the collapse of the generalized emergent Vaidya spacetime in the setting of $f(\bar{R}, \bar{T})$ gravity, specifically in K-essence theory. In this study, the Dirac-Born-Infeld type non-standard Lagrangian is used to calculate
Externí odkaz:
http://arxiv.org/abs/2308.13574
Publikováno v:
Physics of the Dark Universe 2024
In this work, we investigate for an analytical solution under modified gravity theory, specifically the $f(R,T)$ gravity for two different eras, i.e., matter and dark energy dominated accelerating universe from completely geometrical and mathematical
Externí odkaz:
http://arxiv.org/abs/2308.03798
Publikováno v:
Fortschritte der Physik, 2023
We investigate how the Raychaudhuri equation behaves in the $k$-essence geometry. As far as we are concerned, both the early and current epochs of the universe are relevant to the $k$-essence theory. Here, we have studied the $k$-essence geometry usi
Externí odkaz:
http://arxiv.org/abs/2303.03118