Andreev reflections and the quantum physics of black holes

It has been found recently that the entropy relations of horizons have the universality of black hole mass-independence for many black holes. These universal entropy relations have some geometric and CFT understanding, which may provide further insight into the quantum physics of black holes. In this paper, we present the leading order of black hole entropy sum relations under the quantum corrections. It is found that the modified entropy sum becomes mass-dependent for some black holes in asymptotical (A)dS and flat space–times. We also give an example that the modified entropy sum of regular Bardeen AdS black holes is mass-independent, which may be quantized in the form of the electric charge and the cosmological constant.

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EFFECTIVE TEMPERATURE, HAWKING RADIATION AND QUASINORMAL MODES

International Journal of Modern Physics D ◽

10.1142/s0218271812420230 ◽

2012 ◽

Vol 21 (11) ◽

pp. 1242023 ◽

Cited By ~ 42

Author(s):

CHRISTIAN CORDA

Keyword(s):

Black Holes ◽

Quantum Gravity ◽

Excited States ◽

Effective Temperature ◽

Hawking Radiation ◽

Quantum Physics ◽

Quasinormal Modes ◽

Gravity Theory ◽

Large N ◽

Physics Of Black Holes

Parikh and Wilczek have shown that Hawking radiation's spectrum cannot be strictly thermal. Such a nonstrictly thermal character implies that the spectrum is also not strictly continuous and thus generates a natural correspondence between Hawking radiation and black hole's quasinormal modes. This issue endorses the idea that, in an underlying unitary quantum gravity theory, black holes result in highly excited states. We use this key point to re-analyze the spectrum of black hole's quasinormal modes by introducing a black hole's effective temperature. Our analysis changes the physical understanding of such a spectrum and enables a re-examination of various results in the literature which realizes important modifications on quantum physics of black holes. In particular, the formula of the horizon's area quantization and the number of quanta of area are modified into functions of the quantum "overtone" number n. Consequently, Bekenstein–Hawking entropy, its sub-leading corrections and the number of microstates, i.e. quantities which are fundamental to realize unitary quantum gravity theory, are also modified. They become functions of the quantum overtone number too. Previous results in the literature are re-obtained in the very large n limit.

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The Quantum Physics of Black Holes: Results from String Theory

Annual Review of Nuclear and Particle Science ◽

10.1146/annurev.nucl.50.1.153 ◽

2000 ◽

Vol 50 (1) ◽

pp. 153-206 ◽

Cited By ~ 29

Author(s):

Sumit R. Das ◽

Samir D. Mathur

Keyword(s):

Black Holes ◽

String Theory ◽

Hawking Radiation ◽

Quantum Physics ◽

Recent Progress ◽

Physics Of Black Holes

▪ Abstract We review recent progress in our understanding of the physics of black holes. In particular, we discuss the ideas from string theory that explain the entropy of black holes from a counting of microstates of the hole, and the related derivation of unitary Hawking radiation from such holes.

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Bootstrapped Newtonian Cosmology and the Cosmological Constant Problem

Symmetry ◽

10.3390/sym13020358 ◽

2021 ◽

Vol 13 (2) ◽

pp. 358

Author(s):

Roberto Casadio ◽

Andrea Giusti

Keyword(s):

Black Holes ◽

Cosmological Constant ◽

Quantum Cosmology ◽

Quantum Physics ◽

Gravitational Interaction ◽

Newtonian Gravity ◽

Cosmological Constant Problem ◽

Newtonian Cosmology ◽

Natural Solution ◽

The Impact

Bootstrapped Newtonian gravity was developed with the purpose of estimating the impact of quantum physics in the nonlinear regime of the gravitational interaction, akin to corpuscular models of black holes and inflation. In this work, we set the ground for extending the bootstrapped Newtonian picture to cosmological spaces. We further discuss how such models of quantum cosmology can lead to a natural solution to the cosmological constant problem.

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Physics of black holes

10.1063/1.33481 ◽

1982 ◽

Author(s):

Kip S. Thorne

Keyword(s):

Black Holes ◽

Physics Of Black Holes

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Micro Black Holes Near the Earth’s Surface: Case Reports Explained

Advances in Earth and Environmental Science ◽

10.47485/2766-2624.1018 ◽

2022 ◽

Keyword(s):

Black Holes ◽

Case Reports ◽

Physics Of Black Holes

UFO reports can in many cases be explained by tiny black holes (down antiquarks) floating in the atmosphere. The geomorphology of the locations where these are observed are the explaining factor. It helps to better understand the physics of black holes. Cases in Hessdalen, in Nuremberg, in Basel, in the Vallée des Merveilles and in Krasnoyarsk are surveyed and precisely explained.

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Black hole thermodynamics in Snyder phase space

International Journal of Geometric Methods in Modern Physics ◽

10.1142/s021988781750164x ◽

2017 ◽

Vol 14 (11) ◽

pp. 1750164

Author(s):

Sara Saghafi ◽

Kourosh Nozari

Keyword(s):

Black Holes ◽

Black Hole ◽

Phase Space ◽

Symplectic Structure ◽

Symplectic Manifolds ◽

Black Hole Thermodynamics ◽

Schwarzschild Black Hole ◽

Noncommutative Phase Space ◽

Physics Of Black Holes ◽

First Time

By defining a noncommutative symplectic structure, we study thermodynamics of Schwarzschild black hole in a Snyder noncommutative phase space for the first time. Since natural cutoffs are the results of compactness of symplectic manifolds in phase space, the physics of black holes in such a space would be affected mainly by these cutoffs. In this respect, this study provides a basis for more deeper understanding of the black hole thermodynamics in a pure mathematical viewpoint.

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