scholarly journals Black hole collapse simulated by vacuum fluctuations with a moving semitransparent mirror

2008 ◽  
Vol 77 (4) ◽  
Author(s):  
Jaume Haro ◽  
Emilio Elizalde
Keyword(s):  
Black Hole ◽  
Vacuum Fluctuations ◽  
Semitransparent Mirror

scholarly journals State-Space Geometry, Statistical Fluctuations, and Black Holes in String Theory

2014 ◽  
Vol 2014 ◽  
pp. 1-17
Author(s):  
Stefano Bellucci ◽  
Bhupendra Nath Tiwari
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
String Theory ◽  
State Space ◽  
The State ◽  
Statistical Fluctuation ◽  
Vacuum Fluctuations ◽  
Intrinsic Geometry ◽  
Statistical Fluctuations ◽  
Space Geometry

We study the state-space geometry of various extremal and nonextremal black holes in string theory. From the notion of the intrinsic geometry, we offer a state-space perspective to the black hole vacuum fluctuations. For a given black hole entropy, we explicate the intrinsic geometric meaning of the statistical fluctuations, local and global stability conditions, and long range statistical correlations. We provide a set of physical motivations pertaining to the extremal and nonextremal black holes, namely, the meaning of the chemical geometry and physics of correlation. We illustrate the state-space configurations for general charge extremal black holes. In sequel, we extend our analysis for various possible charge and anticharge nonextremal black holes. From the perspective of statistical fluctuation theory, we offer general remarks, future directions, and open issues towards the intrinsic geometric understanding of the vacuum fluctuations and black holes in string theory.

scholarly journals INSTABILITY OF THE BLACK HOLE HORIZON WITH RESPECT TO ELECTROMAGNETIC EXCITATIONS

2009 ◽  
Vol 18 (14) ◽  
pp. 2351-2356 ◽  
Author(s):  
ALEXANDER BURINSKII
Keyword(s):  
Black Hole ◽  
Exact Solutions ◽  
Maxwell Equations ◽  
Information Loss ◽  
Black Hole Horizon ◽  
Back Reaction ◽  
Vacuum Fluctuations

Analyzing exact solutions to the Einstein–Maxwell equations in the Kerr–Schild formalism, we show that the black hole horizon is unstable with respect to electromagnetic excitations. Contrary to perturbative smooth harmonic solutions, the exact solutions for electromagnetic excitations on the Kerr background are accompanied by singular beams which have very strong back-reaction to the metric and break the horizon, forming the holes which allow radiation to escape from the interior of the black hole. As a result, even the weak vacuum fluctuations break the horizon topologically, covering it by a set of fluctuating microholes. We conclude with a series of nontrivial consequences, one of which is that there is no information loss inside of the black hole.

scholarly journals ENTANGLEMENT AND THERMODYNAMICS OF BLACK HOLE ENTROPY

2008 ◽  
Vol 17 (13n14) ◽  
pp. 2549-2553 ◽  
Author(s):  
R. BROUT
Keyword(s):  
Black Hole ◽  
Energy Density ◽  
Vacuum Energy ◽  
Entanglement Entropy ◽  
Black Hole Entropy ◽  
Vacuum Energy Density ◽  
Vacuum Fluctuations ◽  
The Stability

Using simple conditions drawn from the stability of the cosmos in terms of vacuum energy density, the cutoff momentum of entanglement is related to the Planckian mass. In so doing the black hole entropy is shown to be independent of the number of field species that contribute to vacuum fluctuations. And this is in spite of the fact that the number of field species is a linear multiplicand of the entanglement entropy when the latter is expressed in terms of the fundamental momentum cutoff of all fields.

scholarly journals ENERGY DISTRIBUTION IN THE DYADOSPHERE OF A REISSNER–NORDSTRÖM BLACK HOLE IN MØLLER'S PRESCRIPTION

2006 ◽  
Vol 21 (25) ◽  
pp. 1947-1956 ◽  
Author(s):  
ELIAS C. VAGENAS
Keyword(s):  
Black Hole ◽  
Energy Distribution ◽  
Weak Field ◽  
Specific Form ◽  
Vacuum Fluctuations ◽  
Field Limit ◽  
Weak Field Limit ◽  
Momentum Distributions ◽  
Energy And Momentum ◽  
Momentum Complex

The energy and momentum distributions in the dyadosphere of a Reissner–Nordström black hole are evaluated. The Møller's energy-momentum complex is employed for this computation. The spacetime under study is modified due to the effects of vacuum fluctuations in the dyadosphere. Therefore, the corrected Reissner–Nordström black hole metric takes into account the first contribution of the weak field limit of one-loop QED. Furthermore, a comparison and a consequent connection between our results and those already existing in the literature is provided. We hypothesize that when the energy distribution is of specific form there is a relation that connects the coefficients in the Einstein's prescription with those in the Møller's prescription.

scholarly journals Nonlocal Black Hole Evaporation and Quantum Metric Fluctuations via Inhomogeneous Vacuum Density

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Alexander Y. Yosifov ◽  
Lachezar G. Filipov
Keyword(s):  
Black Hole ◽  
Quantum Information ◽  
Vacuum Energy ◽  
Vacuum Energy Density ◽  
Back Reaction ◽  
Vacuum Fluctuations ◽  
Schwarzschild Black Hole ◽  
Black Hole Background ◽  
Schwarzschild Radius ◽  
Metric Fluctuations

Inhomogeneity of the actual value of the vacuum energy density is considered in a black hole background. We examine the back-reaction of a Schwarzschild black hole to the highly inhomogeneous vacuum density and argue the fluctuations lead to deviations from general relativity in the near-horizon region. In particular, we found that vacuum fluctuations onto the horizon trigger adiabatic release of quantum information, while vacuum fluctuations in the vicinity of the horizon produce potentially observable metric fluctuations of order of the Schwarzschild radius. Consequently, we propose a form of strong nonviolent nonlocality in which we simultaneously get nonlocal release of quantum information and observable metric fluctuations.

scholarly journals The vecro hypothesis

2020 ◽  
Vol 29 (15) ◽  
pp. 2030009
Author(s):  
Samir D. Mathur
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Quantum Gravity ◽  
Black Hole Horizon ◽  
Cosmological Horizon ◽  
Leading Order ◽  
Vacuum Fluctuations ◽  
Curved Spacetime ◽  
Black Hole Information

We consider three fundamental issues in quantum gravity: (a) the black hole information paradox (b) the unboundedness of entropy that can be stored inside a black hole horizon (c) the relation between the black hole horizon and the cosmological horizon. With help from the small corrections theorem, we convert each of these issues into a sharp conflict. We then argue that all three conflicts can be resolved by the following hypothesis: the vacuum wave functional of quantum gravity contains a “vecro” component made of virtual fluctuations of configurations of the same type that arise in the fuzzball structure of black hole microstates. Further, if we assume that causality holds to leading order in gently curved spacetime, then we must have such a vecro component in order to resolve the above conflicts. The term vecro stands for “Virtual Extended Compression-Resistant Object”, and characterizes the nature of the vacuum fluctuations that resolve the puzzles. It is interesting that puzzle (c) may relate the role of quantum gravity in black holes to observations in the sky.

scholarly journals Source vacuum fluctuations of black-hole radiance

1994 ◽  
Vol 11 (12) ◽  
pp. 2919-2938 ◽  
Author(s):  
F Englert ◽  
S Massar ◽  
R Parentani
Keyword(s):  
Black Hole ◽  
Vacuum Fluctuations

scholarly journals Kerr Black Holes within a Modified Theory of Gravity

Universe ◽  
2019 ◽  
Vol 5 (9) ◽  
pp. 191 ◽  
Author(s):  
Peter O. Hess ◽  
Enrique López-Moreno
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Event Horizon ◽  
Kerr Black Hole ◽  
Standard Theory ◽  
Vacuum Fluctuations ◽  
Modified Theory Of Gravity ◽  
Theory Of Gravity ◽  
Modified Theory ◽  
Light Ring

The Kerr black hole is studied within a modified theory of gravity, which adds the effects of vacuum fluctuations near a black hole. These vacuum fluctuations are treated as a dark energy. A parameter is introduced to account for these fluctuations. It is zero for the standard theory and acquires a maximal value, just before there would be no event horizon. The existence of an event horizon not only depends on the value of this parameter, but also on the spin of the black hole. In addition, we study the existence of a light-ring. We also elaborate on the relation of the appearance and vanishing of the event horizon and light-ring to phase transitions.

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