Results 51 to 60 of about 707,832 (374)
Singularities in Gravitational Collapse with Radial Pressure [PDF]
General Relativity and Gravitation, 2001 We analyze spherical dust collapse with non-vanishing radial pressure, $ $, and vanishing tangential stresses. Considering a barotropic equation of state, $ = $, we obtain an analytical solution in closed form---which is exact for $ =-1,0$, and approximate otherwise---near the center of symmetry (where the curvature singularity forms).
Sanjay Jhingan +1 more
openaire +4 more sources
Quantum evaporation of a naked singularity [PDF]
, 2005 We investigate here quantum effects in gravitational collapse of a scalar field model which classically leads to a naked singularity. We show that non-perturbative semi-classical modifications near the singularity, based on loop quantum gravity, give ...
A. Ashtekar +8 more
core +3 more sources
Quantum backreaction on chronology horizons
Journal of High Energy Physics, 2022 We extend in two directions our recent investigation of strongly interacting quantum fields in a class of spacetimes with chronology horizons (Misner spacetimes).
Roberto Emparan, Marija Tomašević
doaj +1 more source
Non-linear instability of Kerr-type Cauchy horizons [PDF]
, 1995 Using the general solution to the Einstein equations on intersecting null surfaces developed by Hayward, we investigate the non-linear instability of the Cauchy horizon inside a realistic black hole.
A. Bonanno +26 more
core +2 more sources
Gravitational Collapse and Singularity Removal in Rastall Theory
Advances in High Energy Physics, 2021 In the present work, we study spherically symmetric gravitational collapse of a homogeneous fluid in the framework of Rastall gravity. Considering a nonlinear equation of state (EoS) for the fluid profiles, we search for a class of nonsingular collapse ...
Ehsan Dorrani
doaj +1 more source
Non-minimal gravitational coupling of phantom and big rip singularity [PDF]
, 2013 We consider a non-minimal coupling of a perfect fluid matter system with geometry, which the coupling function is taken to be an arbitrary function of the Ricci scalar.
Y. Bisabr
semanticscholar +1 more source
Holomorphic classical limit for spin effects in gravitational and electromagnetic scattering [PDF]
Journal of High Energy Physics, 2017 We provide universal expressions for the classical piece of the amplitude given by the graviton/photon exchange between massive particles of arbitrary spin, at both tree and one loop level.
A. Guevara
semanticscholar +1 more source
Classical properties of non-local, ghost- and singularity-free gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 In this paper we will show all the linearized curvature tensors in the infinite derivative ghost and singularity free theory of gravity in the static limit.
L. Buoninfante +3 more
semanticscholar +1 more source
Gravitational lensing by rotating naked singularities [PDF]
Physical Review D, 2008 35 pages, 30 ...
Stoytcho S. Yazadjiev +2 more
openaire +4 more sources
Solving the Hierarchy Problem with Noncompact Extra Dimensions [PDF]
, 1999 We show that gravitational effects of global cosmic 3-branes can be responsible for compactification from six to four space-time dimensions, naturally producing the observed hierarchy between electroweak and gravitational forces. The finite radius of the
Andrew G. Cohen +16 more
core +5 more sources