Optical analogy of gravitational collapse and quantum tunneling of the event horizon

2020 ◽  
Vol 22 (3) ◽  
pp. 035605
Author(s):  
Jingming Chen ◽  
Run-Qiu Yang ◽  
Shining Zhu ◽  
Hui Liu
Keyword(s):  
Event Horizon ◽  
Gravitational Collapse ◽  
Quantum Tunneling ◽  
Optical Analogy

scholarly journals The Accurate Modification of Tunneling Radiation of Fermions with Arbitrary Spin in Kerr-de Sitter Black Hole Space-Time

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
Bei Sha ◽  
Zhi-E Liu ◽  
Xia Tan ◽  
Yu-Zhen Liu ◽  
Jie Zhang
Keyword(s):  
Black Hole ◽  
Dispersion Relation ◽  
String Theory ◽  
Event Horizon ◽  
Quantum Tunneling ◽  
Gravitational Theory ◽  
Arbitrary Spin ◽  
Space Time ◽  
De Sitter ◽  
Tunneling Radiation

The quantum tunneling radiation of fermions with arbitrary spin at the event horizon of Kerr-de Sitter black hole is accurately modified by using the dispersion relation proposed in the study of string theory and quantum gravitational theory. The derived tunneling rate and temperature at the black hole horizons are analyzed and studied.

scholarly journals Meaningless Questions in Cosmology and Relativistic Astrophysics

1976 ◽  
Vol 31 (11) ◽  
pp. 1271-1276 ◽  
Author(s):  
M. Heller ◽  
M. Reinhardt
Keyword(s):  
Event Horizon ◽  
Gravitational Collapse ◽  
Space Time ◽  
Initial Singularity ◽  
Relativistic Astrophysics ◽  
General Classification ◽  
The Universe

Abstract After a general classification of meaningless questions in science we concentrate on empirically meaningless questions. Introducing the concepts of informationally connected, semiconnected and disconnected observers, a formalism for the analysis of the informational structure of space-time is developed. We discuss some problems of epistemological nature in cosmology and blade hole physics. A number of questions like "What was 'before' the initial singularity of the universe?" or "What is the fate of matter in gravitational collapse inside the event horizon?" turn out to be empirically meaningless. We also show that a "wormhole" does not violate causality for the set of informationally connected observers who do not enter it.

scholarly journals ON THE RELATIVISTIC GRAVITATIONAL COLLAPSE ET CETERA

2014 ◽  
Author(s):  
Angelo Loinger ◽  
Tiziana Marsico
Keyword(s):  
Internal Pressure ◽  
Observational Data ◽  
Event Horizon ◽  
Gravitational Collapse ◽  
Mass Point ◽  
Finite Volumes

Massive and supermassive “dust” spheres (with a zero internal pressure) collapse to compact “full spheres” of finite volumes, whose surfaces have the properties of the event horizon of a gravitating mass-point. By virtue of Hilbert’s repulsive effect, both the event horizon of a mass-point and the event horizon of a “full sphere” cannot “swallow” anything, in contradiction with the assertion of a locus communis. The observational data corroborate our results.

scholarly journals Gravitational collapse in the AdS background and the black hole formation

2016 ◽  
Vol 25 (01) ◽  
pp. 1650005 ◽  
Author(s):  
Alireza Allahyari ◽  
Javad T. Firouzjaee ◽  
Reza Mansouri
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Event Horizon ◽  
Gravitational Collapse ◽  
Apparent Horizon ◽  
Rapid Change ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Hole Formation ◽  
Thermalization Time

We study the time evolution of the Misner-Sharp mass and the apparent horizon for gravitational collapse of a massless scalar field in the [Formula: see text] spacetime for both cases of narrow and broad waves by numerically solving the Einstein’s equations coupled to a massless scalar field. This is done by relying on the full dynamics of the collapse including the concept of the dynamical horizon. It turns out that the Misner-Sharp mass is everywhere constant except for a rapid change across a thin shell defined by the density profile of the collapsing wave. By studying the evolution of the apparent horizon, indicating the formation of a black hole at different times we see how asymptotically an event horizon forms. The dependence of the thermalization time on the radius of the initial black hole event horizon is also studied.

scholarly journals Quantum tunneling approach of noncommutative geometry

2019 ◽  
Author(s):  
Vitaly Kuyukov
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Quantum Information ◽  
Minkowski Space ◽  
Event Horizon ◽  
Noncommutative Geometry ◽  
Quantum Tunneling ◽  
Holographic Principle ◽  
Minkowski Space Time ◽  
Thermodynamics Of Black Holes

Hawking and Beckenstein’s theory of the thermodynamics of black holes indicates that there is a connection between quantum information and gravity. In general, their result is called the holographic principle. According to it, the entropy of a black hole is proportional to the area of the sphere of the event horizon. In this paper, noncommutative geometry is generalized using the holographic principle. Under certain assumptions, it is possible to obtain results from this synthesis regarding the geometry of the Minkowski space-time. To do this, we consider two main provisions for the generalization of noncommutative geometry.

scholarly journals TESTING THE KERR BLACK HOLE HYPOTHESIS

2011 ◽  
Vol 26 (33) ◽  
pp. 2453-2468 ◽  
Author(s):  
COSIMO BAMBI
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Event Horizon ◽  
Gravitational Collapse ◽  
State Of The Art ◽  
Kerr Black Hole ◽  
The State ◽  
Kerr Geometry

It is thought that the final product of the gravitational collapse is a Kerr black hole and astronomers have discovered several good astrophysical candidates. While there are some indirect evidences suggesting that the latter have an event horizon, and therefore that they are black holes, a proof that the spacetime around these objects is described by the Kerr geometry is still lacking. Recently, there has been an increasing interest in the possibility of testing the Kerr black hole hypothesis with present and future experiments. In this paper, I briefly review the state-of-the-art of the field, focusing on some recent results and works in progress.

Fermion tunneling, Instability and First Law of Rindler Modified Schwarzschild Black Hole as a Thermodynamic system

2020 ◽  
Author(s):  
S. Fatemeh Mirekhtiary ◽  
I. Sakalli ◽  
V. Bashiry
Keyword(s):  
Thermal Stability ◽  
Black Hole ◽  
Cosmological Constant ◽  
Event Horizon ◽  
Quantum Tunneling ◽  
Thermodynamic System ◽  
Unstable System ◽  
Schwarzschild Black Hole ◽  
Rindler Acceleration ◽  
Thermal Stability Of

This study investigated quantum tunneling of spin half particles through the event horizon of Rindler modified Schwarzschild black hole (RMSBH) in the presence of quintessence matter. We analyzed the thermodynamics of RMSBH in the Kiselev coordinates. Particularly, exploring RMSBH's entropy and the thermal stability of the RMSBH. We showed that RMSBH serves an unstable system causing fluctuations. The integral formulation of the first law of RMSBH in the absence of cosmological constant was also represented. By using the first law, we finally studied the Ruppeiner geometry for Rindler acceleration and pressure with fixed ensembles .

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