Results 31 to 40 of about 120,404 (314)

Evanescent black holes [PDF]

open access: yesPhysical Review D, 1992
A renormalizable theory of quantum gravity coupled to a dilaton and conformal matter in two space-time dimensions is analyzed. The theory is shown to be exactly solvable classically. Included among the exact classical solutions are configurations describing the formation of a black hole by collapsing matter.
Callan, C.   +3 more
openaire   +3 more sources

Effects of (un)usual asymptotics on shadows and lensing of rotating black holes: Numerical and perturbative treatments

open access: yesPhysics Letters B
We consider the slowly rotating black hole with non-flat, non-(A)dS asymptotics and the rotating black holes with AdS asymptotics in the Einstein-Maxwell-dilaton (EMD) theory, and compare the shadows for such black holes with the Kerr-Newman-AdS black ...
Yong-Zhuang Li, Xiao-Mei Kuang
doaj   +1 more source

THE LOVELOCK BLACK HOLES

open access: yesModern Physics Letters A, 2008
Lovelock theory is a natural extension of Einstein theory of gravity to higher dimensions, and it is of great interest in theoretical physics as it describes a wide class of models. In particular, it describes string theory inspired ultraviolet corrections to Einstein–Hilbert action, while admits the Einstein general relativity and the so-called Chern–
Garraffo, Cecilia, Giribet, Gaston
openaire   +2 more sources

Thermodynamics of the Schwarzschild and the Reissner–Nordström black holes with quintessence

open access: yesNuclear Physics B, 2016
In this paper, we study the thermodynamics of the Schwarzschild and the Reissner–Nordström black holes surrounded by quintessence. By using the thermodynamical laws of the black holes, we derive the thermodynamic properties of these black holes and we ...
K. Ghaderi, B. Malakolkalami
doaj   +1 more source

Martin Heidegger and the Being and Time of Black Holes [PDF]

open access: yesФилософия и космология, 2020
Scientific narratives about cosmology often present black holes as frightening objects of both creation and destruction, the centres of which are concealed behind event horizons.
Gregory Phipps
doaj   +1 more source

Classical and thermodynamic stability of black holes

open access: yes, 2010
We consider the stability of black holes within both classical general relativity and the semiclassical thermodynamic description. In particular, we study linearised perturbations and their contributions to the gravitational partition function. Exploring

core   +1 more source

How strings can explain regular black holes

open access: yes, 2023
This paper reviews the role of black holes in the context of fundamental physics. After recalling some basic results stemming from Planckian string calculations, I present three examples of how stringy effects can improve the curvature singularity of ...
Nicolini, Piero, Nicolini, P
core   +1 more source

QUANTIZATION OF BLACK HOLES [PDF]

open access: yesModern Physics Letters A, 1998
We show that black holes can be quantized in an intuitive and elegant way with results in agreement with conventional knowledge of black holes by using Bohr's idea of quantizing the motion of an electron inside the atom in quantum mechanics. We find that properties of black holes can also be derived from an ansatz of quantized entropy [Formula: see ...
He, Xiao-Gang, Ma, Bo-Qiang
openaire   +4 more sources

Virtual black holes [PDF]

open access: yesPhysical Review D, 1996
One would expect spacetime to have a foam-like structure on the Planck scale with a very high topology. If spacetime is simply connected (which is assumed in this paper), the non-trivial homology occurs in dimension two, and spacetime can be regarded as being essentially the topological sum of $S^2\times S^2$ and $K3$ bubbles.
openaire   +3 more sources

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