scholarly journals Geometrothermodynamics of black holes in Lovelock gravity with a nonlinear electrodynamics

2015 ◽  
Vol 91 (2) ◽  
Author(s):  
S. H. Hendi ◽  
R. Naderi
Keyword(s):  
Black Holes ◽  
Nonlinear Electrodynamics ◽  
Lovelock Gravity

BIonic system: Extraction of Lovelock gravity from a Born–Infeld-type theory

2018 ◽  
Vol 15 (02) ◽  
pp. 1850029
Author(s):  
Yaghoob Naimi ◽  
Alireza Sepehri ◽  
Tooraj Ghaffary ◽  
Hossein Ghaforyan ◽  
Majid Ebrahimzadeh
Keyword(s):  
Black Holes ◽  
String Theory ◽  
Type Theory ◽  
Close Relation ◽  
Nonlinear Electrodynamics ◽  
Lovelock Gravity ◽  
Exponential Form ◽  
Gravity Changes ◽  
Gauge Gravity ◽  
M Theory

It was shown that both Lovelock gravity and Born–Infeld (BI) electrodynamics can be obtained from low effective limit of string theory. Motivated by the mentioned unique origin of the gauge-gravity theories, we are going to find a close relation between them. In this research, we start from the Lagrangian of a BI-type nonlinear electrodynamics with an exponential form to extract the action of Lovelock gravity. We investigate the origin of Lovelock gravity in a system of branes which are connected with each other by different wormholes through a BIonic system. These wormholes are produced as due to the nonlinear electrodynamics which are emerged on the interacting branes. By approaching branes, wormholes dissolve into branes and Lovelock gravity is generated. Also, throats of some wormholes become smaller than their horizons and they transit to black holes. Generalizing calculations to M-theory, it is found that by compacting Mp-branes, Lovelock gravity changes to nonlinear electrodynamics and thus both of them have the same origin. This result is consistent with the prediction of BIonic model in string theory.

scholarly journals Nonlinear Electrodynamics and Magnetic Black Holes

2017 ◽  
Vol 529 (8) ◽  
pp. 1700073 ◽  
Author(s):  
S. I. Kruglov
Keyword(s):  
Black Holes ◽  
Nonlinear Electrodynamics

scholarly journals Magnetic brane solutions of Lovelock gravity with nonlinear electrodynamics

2015 ◽  
Vol 91 (8) ◽  
Author(s):  
Seyed Hossein Hendi ◽  
Behzad Eslam Panah ◽  
Shahram Panahiyan
Keyword(s):  
Nonlinear Electrodynamics ◽  
Lovelock Gravity

scholarly journals Non-Singular Model of Magnetized Black Hole Based on Nonlinear Electrodynamics

Universe ◽  
2019 ◽  
Vol 5 (12) ◽  
pp. 225 ◽  
Author(s):  
Sergey I. Kruglov
Keyword(s):  
Black Holes ◽  
Heat Capacity ◽  
Black Hole ◽  
Hawking Temperature ◽  
Nonlinear Electrodynamics ◽  
De Sitter ◽  
Fundamental Length ◽  
Gravity Effects ◽  
Black Hole Spacetime ◽  
Thermodynamics Of Black Holes

A new modified Hayward metric of magnetically charged non-singular black hole spacetime in the framework of nonlinear electrodynamics is constructed. When the fundamental length introduced, characterising quantum gravity effects, vanishes, one comes to the general relativity coupled with the Bronnikov model of nonlinear electrodynamics. The metric can have one (an extreme) horizon, two horizons of black holes, or no horizons corresponding to the particle-like solution. Corrections to the Reissner–Nordström solution are found as the radius approaches infinity. As r → 0 the metric has a de Sitter core showing the absence of singularities, the asymptotic of the Ricci and Kretschmann scalars are obtained and they are finite everywhere. The thermodynamics of black holes, by calculating the Hawking temperature and the heat capacity, is studied. It is demonstrated that phase transitions take place when the Hawking temperature possesses the maximum. Black holes are thermodynamically stable at some range of parameters.

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