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We study the formation of black holes by spherical domain wall collapse as seen by an asymptotic observer, using the functional Schrodinger formalism. To explore what signals such observers will see, we study radiation of a scalar quantum…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Tanmay Vachaspati , Dejan Stojkovic , Lawrence M. Krauss

Black hole evaporation is studied using wave packets for the modes. These allow for approximate frequency and time resolution. The leading order late time behavior gives the well known Hawking radiation that is independent of how the black…

General Relativity and Quantum Cosmology · Physics 2019-09-26 Paul R. Anderson , Raymond D. Clark , Alessandro Fabbri , Michael R. R. Good

The question of whether Hawking evaporation violates unitarity, and therefore results in the loss of information, remains unresolved since Hawking's seminal discovery. So far the investigations remain mostly theoretical since it is almost…

General Relativity and Quantum Cosmology · Physics 2017-02-01 Pisin Chen , Gerard Mourou

Motivated by the parallelism existing between the puzzles of classical physics at the beginning of the XXth century and the current paradoxes in the search of a quantum theory of gravity, we give, in analogy with Planck's black body…

General Relativity and Quantum Cosmology · Physics 2015-06-25 A. Fabbri , D. J. Navarro , J. Navarro-Salas

The problem of information loss is considered under the assumption that the process of black hole evaporation terminates in the decay of the black hole interior into a baby universe. We show that such theories can be decomposed into…

High Energy Physics - Theory · Physics 2009-09-17 Joseph Polchinski , Andrew Strominger

We show that the apparent horizon and the region near $r=0$ of an evaporating charged, rotating black hole are timelike. It then follows that for black holes in nature, which invariably have some rotation, have a channel, via which…

General Relativity and Quantum Cosmology · Physics 2021-09-27 Samuel L. Braunstein , Saurya Das , Zhi-Wei Wang

Between 1974 and 1975, Stephen Hawking revolutionized the world of physics by proposing that black holes have temperature, entropy, and evaporate gradually. The objective of this article is to offer a brief and updated introduction to these…

Popular Physics · Physics 2019-05-22 Jorge Pinochet

We provide a simple way for calculating the entropy of a Schwarzschild black hole from the entropy of its Hawking radiation. To this end, we show that if a thermodynamic system loses its energy only through the black body radiation, its…

General Relativity and Quantum Cosmology · Physics 2017-03-13 Sajad Aghapour , Kamal Hajian

We show that although generalized uncertainty principle with negative parameter allows black holes to evaporate completely, this process takes an infinite amount time to achieve, resulting in a metastable remnant.

General Relativity and Quantum Cosmology · Physics 2018-11-06 Yen Chin Ong

We deal with the black hole information loss paradox by showing that the stimulated emission component of the black hole radiation contains information about the initial state of the system. The nonlocal behaviour that allows the recovery…

General Relativity and Quantum Cosmology · Physics 2009-10-22 R. Mueller , Carlos O. Lousto

This talk is about results obtained by Kirill Melnikov and myself pertaining to the canonical quantization of a massless scalar field in the presence of a Schwarzschild black hole. After a brief summary of what we did and how we reproduce…

High Energy Physics - Theory · Physics 2007-05-23 Marvin Weinstein

We define the Bondi energy for two-dimensional dilatonic gravity theories by generalizing the known expression of the ADM energy. We show that our definition of the Bondi energy is exactly the ADM energy minus the radiation energy at null…

High Energy Physics - Theory · Physics 2016-09-06 Won T. Kim , Julian Lee

We revisit the tunneling process from a Schwarzschild black hole in the noncommutative spacetime and obtain the non-thermal tunneling probability. In such non-thermal spectrum, the correlations are discovered, which can carry the…

High Energy Physics - Theory · Physics 2013-12-12 Baocheng Zhang , Qing-yu Cai , Ming-sheng Zhan , Li You

A paradigm describing black hole evaporation in non-perturbative quantum gravity is developed by combining two sets of detailed results: i) resolution of the Schwarzschild singularity using quantum geometry methods; and ii) time-evolution…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Abhay Ashtekar , Martin Bojowald

Unitarization of black hole evaporation requires that quantum information escapes a black hole; an important question is to identify the mechanism or channel by which it does so. Accurate counting of black hole states via the…

High Energy Physics - Theory · Physics 2015-12-30 Steven B. Giddings

This thesis is a review of black hole evaporation with emphasis on recent results obtained for two dimensional black holes. First, the geometry of the most general stationary black hole in four dimensions is described and some classical…

High Energy Physics - Theory · Physics 2007-05-23 Farid Benachenhou

We propose a step towards a resolution to black hole information paradox by analyzing scattering amplitudes of a complex scalar field around a Schwarzschild black hole. The scattering cross section reveals much information on the incoming…

High Energy Physics - Theory · Physics 2014-03-17 I. Y. Park

Hawking's prediction of black-hole evaporation depends on the application of known physics to fantastically high energies -- well beyond the Planck scale. Here, I show that before these extreme regimes are reached, another physical effect…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Adam D. Helfer

Many discussion about the black hole conundrums, such as singularity and information loss, suggested that there must be some essential irreconcilable conflict between quantum theory and classical gravity theory, which cannot be solved with…

General Physics · Physics 2015-03-18 Sun Yi

The information conservation principle is probed for classically isolated systems, like the Hubble sphere and black holes, for which the rise of entanglement entropy across their horizons is expected. We accept the analogy of Landauer's…

General Relativity and Quantum Cosmology · Physics 2022-05-27 Merab Gogberashvili , Beka Modrekiladze