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In this paper, we study the quasi-normal modes (QNMs) of a scalar field in the background of a large class of quantum black holes that can be formed from gravitational collapse of a dust fluid in the framework of effective loop quantum…

General Relativity and Quantum Cosmology · Physics 2024-10-24 Chao Zhang , Anzhong Wang

A recent understanding on how quantum effects may affect black-hole evolution opens new scenarios for dark matter, in connection with the presence of black holes in the very early universe. Quantum fluctuations of the geometry allow for…

General Relativity and Quantum Cosmology · Physics 2018-12-27 Francesca Vidotto

We present a broad review on black holes. We analyse some of the fundamental concepts in black hole theory, the observational and theoretical status of stellar and galactic black holes, and their appearance as quantum objects.

Astrophysics · Physics 2007-05-23 Jose' P. S. Lemos

We examine spherical gravitational collapse of a matter model with vanishing radial pressure and non-zero tangential pressure. It is seen analytically that the collapsing cloud either forms a black hole or disperses depending on values of…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Ashutosh Mahajan , Pankaj S. Joshi

It has been recently suggested that small mass black holes (BHs) may become unstable due to quantum-gravitational effects and eventually decay, producing radiation, on a timescale shorter than the Hawking evaporation time. We argue that the…

Cosmology and Nongalactic Astrophysics · Physics 2018-08-07 Alvise Raccanelli , Francesca Vidotto , Licia Verde

We provide a (simplified) quantum description of primordial black holes at the time of their formation. Specifically, we employ the horizon quantum mechanics to compute the probability of black hole formation starting from a simple quantum…

General Relativity and Quantum Cosmology · Physics 2019-09-04 R. Casadio , A. Giugno , A. Giusti , M. Lenzi

In models with TeV-scale gravity it is expected that mini black holes will be produced in near-future accelerators. On the other hand, TeV-scale gravity is plagued with many problems like fast proton decay, unacceptably large…

High Energy Physics - Phenomenology · Physics 2009-11-11 De-Chang Dai , Glenn D. Starkman , Dejan Stojkovic

In this paper we present a suitably adjusted Higgs-like mechanism producing black holes at, and beyond, the Planck energy. Planckian objects are difficult to classify either as "particles", or as "black holes", since the Compton wavelength…

High Energy Physics - Theory · Physics 2018-08-01 Euro Spallucci , Anais Smailagic

We study the decoherence induced by near-extremal charged black holes on quantum systems in their exterior. Specifically, we analyze a thought experiment recently discussed in the literature, where the quantum system is a charged particle…

High Energy Physics - Theory · Physics 2026-05-25 Anna Biggs , Stefano Trezzi

In this paper we present the status of the physics of Planck scale black holes with particular reference to their conjectured production in particle accelerator experiments at the terascale. After reviewing some open issues of fundamental…

High Energy Physics - Phenomenology · Physics 2017-10-05 Michael Florian Wondrak , Piero Nicolini , Marcus Bleicher

Primordial black holes can be produced by a long range attractive fifth force stronger than gravity, mediated by a light scalar field interacting with nonrelativistic "heavy" particles. As soon as the energy fraction of heavy particles…

Cosmology and Nongalactic Astrophysics · Physics 2018-04-25 Luca Amendola , Javier Rubio , Christof Wetterich

Based on the latest public results, 13 TeV data from the Large Hadron Collider at CERN has not indicated any evidence of hitherto tested models of quantum black holes, semiclassical black holes, or string balls. Such models have predicted…

High Energy Physics - Phenomenology · Physics 2018-01-17 Elena Villhauer

We review the perhaps most exciting phenomenology of models with extra spatial dimensions and Planck scale near TeV: the production of mini black holes in ultrahigh energy particle collisions, and the discovery potential of cosmic…

High Energy Physics - Phenomenology · Physics 2007-05-23 Huitzu Tu

Primordial black holes can be produced by density fluctuations generated from delayed vacuum decays of first-order phase transition. The primordial black holes generated at the electroweak phase transition have masses of about $10^{-5}$…

High Energy Physics - Phenomenology · Physics 2022-07-27 Katsuya Hashino , Shinya Kanemura , Tomo Takahashi

We introduce, in a systematic way, a set of generating functions that solve all the different combinatorial problems that crop up in the study of black hole entropy in Loop Quantum Gravity. Specifically we give generating functions for: The…

General Relativity and Quantum Cosmology · Physics 2008-11-26 J. Fernando Barbero G. , Eduardo J. S. Villaseñor

In theories with large extra dimension and with low quantum gravity scale near a TeV, it is expected that TeV-scale black holes to be produced in proton-proton collisions at the LHC with the center of mass energy of 14 TeV. Since the black…

High Energy Physics - Phenomenology · Physics 2009-01-06 M. Mohammadi Najafabadi , S. Paktinat Mehdiabadi

One of the most dramatic consequences of low-scale (~1 TeV) quantum gravity is copious production of mini black holes at future accelerators and in ultra-high-energy cosmic ray interactions. Hawking radiation of these black holes is…

High Energy Physics - Phenomenology · Physics 2009-11-07 Greg Landsberg

We have studied quasinormal modes of scalar perturbations of a black hole in massive gravity. The parameters of the theory, such as the mass of the black hole, the scalar charge of the black hole and the spherical harmonic index is varied…

General Relativity and Quantum Cosmology · Physics 2015-06-23 Sharmanthie Fernando , Tyler Clark

The production of Large Extra Dimension (LXD) Black Holes (BHs), with a new, fundamental mass scale of $M_f = 1$ TeV, has been predicted to occur at the Large Hadron Collider, LHC, with the formidable rate of $10^8$ per year in p-p…

High Energy Physics - Phenomenology · Physics 2008-11-26 Horst Stoecker

In the background of unparticle-enhanced black hole geometry, we provide the quasinormal modes of scalar, vector, and Dirac particles around it. Ungravity by tensor unparticles contributes positively to the Newtonian gravity and black holes…

High Energy Physics - Phenomenology · Physics 2015-05-28 Jong-Phil Lee