scholarly journals Weak cosmic censorship conjecture in Kerr-Newman-(anti-)de Sitter black hole with charged scalar field

2021 ◽  
Vol 2021 (10) ◽  
pp. 012
Author(s):  
Bogeun Gwak
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Cosmic Censorship ◽  
De Sitter ◽  
Charged Scalar ◽  
Charged Scalar Field ◽  
Cosmic Censorship Conjecture

scholarly journals CFT dual of charged AdS black hole in the large dimension limit

2016 ◽  
Vol 25 (07) ◽  
pp. 1650085 ◽  
Author(s):  
Er-Dong Guo ◽  
Miao Li ◽  
Jia-Rui Sun
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Cross Sections ◽  
Central Charge ◽  
Conformal Symmetry ◽  
Large Dimension ◽  
Absorption Cross ◽  
De Sitter ◽  
Charged Scalar ◽  
Charged Scalar Field

We study the dual CFT description of the [Formula: see text]-dimensional Reissner–Nordström-Anti de Sitter (RN-AdS[Formula: see text]) black hole in the large dimension (large [Formula: see text]) limit, both for the extremal and nonextremal cases. The central charge of the dual CFT2 (or chiral CFT1) is calculated for the near-horizon near extremal geometry which possesses an AdS2 structure. Besides, the [Formula: see text]-picture hidden conformal symmetry in the nonextremal background can be naturally obtained by a probe charged scalar field in the large [Formula: see text] limit, without the need to input the usual limits to probe the hidden conformal symmetry. Furthermore, a new dual CFT description of the nonextremal RN-AdS[Formula: see text] black hole is found in the large [Formula: see text] limit and the duality is analyzed by comparing the entropies, the absorption cross-sections and the retarded Green’s functions obtained both from the gravity and the dual CFT sides.

scholarly journals Testing the weak cosmic censorship conjecture in torus-like black hole under charged scalar field

2020 ◽  
Vol 29 (12) ◽  
pp. 2050078
Author(s):  
Wei Hong ◽  
Benrong Mu ◽  
Jun Tao
Keyword(s):  
Black Hole ◽  
Phase Space ◽  
Scalar Field ◽  
Second Law Of Thermodynamics ◽  
Cosmic Censorship ◽  
Second Law ◽  
Complex Scalar ◽  
Charged Scalar ◽  
First Law Of Thermodynamics ◽  
Cosmic Censorship Conjecture

We investigate weak cosmic censorship conjecture in charged torus-like black hole by the complex scalar field scattering. Using the relation between the conserved quantities of a black hole and the scalar field, we can calculate the change of the energy and charge within the infinitesimal time. The change of the enthalpy is connected to the change of energy, then we use those results to test whether the first law, the second law as well as the weak cosmic censorship conjecture are valid. In the normal phase–space, the first law of thermodynamics and the weak cosmic censorship conjecture are valid, and the second law of thermodynamics is not violated. For the specific black hole under scalar field scattering we consider, in the extended phase–space, the first law of thermodynamics and the weak cosmic censorship conjecture are valid. However, the second law of thermodynamics is violated when the black hole’s initial charge reaches a certain value.

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