The Hawking black-hole radiation spectrum has a short tail

2021 ◽  
pp. 2142005
Author(s):  
Shahar Hod
Keyword(s):  
Black Hole ◽  
Emission Spectrum ◽  
Upper Bound ◽  
Mass Formula ◽  
Radiation Spectrum ◽  
Direct Consequence ◽  
Gravitational Coupling ◽  
Schwarzschild Black Hole ◽  
Frequency Scale ◽  
Black Hole Radiation

It is proved that the Hawking emission spectrum of a semiclassical Schwarzschild black hole of mass [Formula: see text] has a sharp cut at the frequency scale [Formula: see text]. In particular, taking into account the nonlinear gravitational coupling between the tunneled Hawking quanta and the emitting black hole, it is explicitly shown that the upper bound [Formula: see text] on the energies of the emitted Hawking quanta is a direct consequence of the famous Thorne hoop relation.

scholarly journals BLACK HOLE EVAPORATION BASED UPON A q-DEFORMATION DESCRIPTION

2005 ◽  
Vol 20 (26) ◽  
pp. 6039-6049 ◽  
Author(s):  
XIN ZHANG
Keyword(s):  
Black Hole ◽  
Degrees Of Freedom ◽  
Radiation Spectrum ◽  
Correlation Effect ◽  
Space Time ◽  
Noncommutative Space ◽  
Schwarzschild Black Hole ◽  
Black Hole Evaporation ◽  
Starting Point ◽  
New Distribution

A toy model based upon the q-deformation description for studying the radiation spectrum of black hole is proposed. The starting point is to make an attempt to consider the space–time noncommutativity in the vicinity of black hole horizon. We use a trick that all the space–time noncommutative effects are ascribed to the modification of the behavior of the radiation field of black hole and a kind of q-deformed degrees of freedom are postulated to mimic the radiation particles that live on the noncommutative space–time, meanwhile the background metric is preserved as usual. We calculate the radiation spectrum of Schwarzschild black hole in this framework. The new distribution deviates from the standard thermal spectrum evidently. The result indicates that some correlation effect will be introduced to the system if the noncommutativity is taken into account. In addition, an infrared cutoff of the spectrum is the prediction of the model.

scholarly journals Ten shades of black

2015 ◽  
Vol 24 (12) ◽  
pp. 1544007 ◽  
Author(s):  
Shahar Hod
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Radiation Spectrum ◽  
Black Hole Physics ◽  
Black Body ◽  
Black Hole Radiation ◽  
Dimensional Spacetime ◽  
Opposite Behavior ◽  
Curvature Potential ◽  
Energy Dependent

The holographic principle has taught us that, as far as their entropy content is concerned, black holes in (3 + 1)-dimensional curved spacetimes behave as ordinary thermodynamic systems in flat (2 + 1)-dimensional spacetimes. In this paper, we point out that the opposite behavior can also be observed in black-hole physics. To show this we study the quantum Hawking evaporation of near-extremal Reissner–Nordström (RN) black holes. We first point out that the black-hole radiation spectrum departs from the familiar radiation spectrum of genuine (3 + 1)-dimensional perfect black-body emitters. In particular, the would be black-body thermal spectrum is distorted by the curvature potential which surrounds the black-hole and effectively blocks the emission of low-energy quanta. Taking into account the energy-dependent gray-body factors which quantify the imprint of passage of the emitted radiation quanta through the black-hole curvature potential, we reveal that the (3 + 1)-dimensional black holes effectively behave as perfect black-body emitters in a flat (9 + 1)-dimensional spacetime.

scholarly journals A quantum-corrected approach to black hole radiation via a tunneling process

2020 ◽  
Vol 2020 (4) ◽  
Author(s):  
Milad Hajebrahimi ◽  
Kourosh Nozari
Keyword(s):  
Black Hole ◽  
Electric Charge ◽  
Hawking Radiation ◽  
Quantum Correction ◽  
Black Hole Physics ◽  
Information Loss ◽  
Schwarzschild Black Hole ◽  
Tunneling Process ◽  
Black Hole Radiation ◽  
Information Loss Problem

Abstract In the language of black hole physics, Hawking radiation is one of the most controversial subjects about which there exist lots of puzzles, including the information loss problem and the question of whether this radiation is thermal or not. In this situation, a possible way to face these problems is to bring quantum effects into play, also taking into account self-gravitational effects in the scenario. We consider a quantum-corrected form of the Schwarzschild black hole inspired by the pioneering work of Kazakov and Solodukhin to modify the famous Parikh–Wilczek tunneling process for Hawking radiation. We prove that in this framework the radiation is not thermal, with a correlation function more effective than the Parikh–Wilczek result, and the information loss problem can be addressed more successfully. Also, we realize that quantum correction affects things in the same way as an electric charge. So, it seems that quantum correction in this framework has something to do with the electric charge.

scholarly journals Corrected Hawking Radiation of Dirac Particles from a General Static Riemann Black Hole

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ge-Rui Chen ◽  
Yong-Chang Huang
Keyword(s):  
Black Hole ◽  
Quantum Theory ◽  
Hawking Radiation ◽  
Radiation Spectrum ◽  
Direct Consequence ◽  
Information Loss ◽  
Back Reaction ◽  
Information Loss Paradox ◽  
Dirac Particles ◽  
Black Hole Information

Considering energy conservation and the back reaction of radiating particles to the spacetime, we investigate the massive Dirac particles' Hawking radiation from a general static Riemann black hole using improved Damour-Ruffini method. A direct consequence is that the radiation spectrum is not strictly thermal. The correction to the thermal spectrum is consistent with an underlying unitary quantum theory and this may have profound implications for the black hole information loss paradox.

scholarly journals Isotropic coordinates for Schwarzschild black hole radiation

2007 ◽  
Vol 650 (5-6) ◽  
pp. 317-320 ◽  
Author(s):  
FuJun Wang ◽  
YuanXing Gui ◽  
ChunRui Ma
Keyword(s):  
Black Hole ◽  
Schwarzschild Black Hole ◽  
Isotropic Coordinates ◽  
Black Hole Radiation

scholarly journals A SECRET TUNNEL THROUGH THE HORIZON

2004 ◽  
Vol 13 (10) ◽  
pp. 2351-2354 ◽  
Author(s):  
MAULIK PARIKH
Keyword(s):  
Black Hole ◽  
Quantum Theory ◽  
Energy Conservation ◽  
Hawking Radiation ◽  
Radiation Spectrum ◽  
Direct Consequence ◽  
Thermal Spectrum ◽  
Black Hole Information

Hawking radiation is often intuitively visualized as particles that have tunneled across the horizon. Yet, at first sight, it is not apparent where the barrier is. Here I show that the barrier depends on the tunneling particle itself. The key is to implement energy conservation, so that the black hole contracts during the process of radiation. A direct consequence is that the radiation spectrum cannot be strictly thermal. The correction to the thermal spectrum is of precisely the form that one would expect from an underlying unitary quantum theory. This may have profound implications for the black hole information puzzle.

scholarly journals Horizon shells: Classical structure at the horizon of a black hole

2016 ◽  
Vol 25 (12) ◽  
pp. 1644010 ◽  
Author(s):  
Matthias Blau ◽  
Martin O’Loughlin
Keyword(s):  
Black Hole ◽  
Event Horizon ◽  
Infinite Number ◽  
Mass Formula ◽  
Black Hole Physics ◽  
Einstein Equations ◽  
Schwarzschild Black Hole ◽  
Schwarzschild Solution ◽  
Classical Structure ◽  
Codimension One

We address the question of the uniqueness of the Schwarzschild black hole by considering the following question: How many meaningful solutions of the Einstein equations exist that agree with the Schwarzschild solution (with a fixed mass [Formula: see text]) everywhere except maybe on a codimension one hypersurface? The perhaps surprising answer is that the solution is unique (and uniquely the Schwarzschild solution everywhere in spacetime) unless the hypersurface is the event horizon of the Schwarzschild black hole, in which case there are actually an infinite number of distinct solutions. We explain this result and comment on some of the possible implications for black hole physics.

On black hole radiation spectrum in loop quantum gravity

2017 ◽  
Vol 23 (1) ◽  
pp. 41-44 ◽  
Author(s):  
K. Mejrhit ◽  
R. Ahl Laamara ◽  
S.-E. Ennadifi
Keyword(s):  
Black Hole ◽  
Quantum Gravity ◽  
Loop Quantum Gravity ◽  
Radiation Spectrum ◽  
Black Hole Radiation
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