Ali Dehghani's research while affiliated with Shiraz University and other places
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Publications (17)
We investigate thermodynamic schemes of charged BTZ-like black holes in arbitrary dimensions, namely higher-dimensional charged black holes in which the electromagnetic sector exhibits the same properties with that of the usual three-dimensional BTZ solution. We first present the Euclidean on-shell action in arbitrary dimensions, inserting a radial...
![The behavior of specific heat, CP\documentclass[12pt]{minimal}...](publication/364613113/figure/fig2/AS:11431281096678279@1668223304819/The-behavior-of-specific-heat-CPdocumentclass12ptminimal-usepackageamsmath_Q320.jpg)
Hyperbolic vacuum black holes in Lovelock gravity theories of odd order N, in which N denotes the order of higher-curvature corrections, are known to have the so-called isolated critical points with nonstandard critical exponents (as α=0, β=1, γ=N-1, and δ=N), different from those of mean-field critical exponents (with α=0, β=1/2, γ=1, and δ=3). Mo...
We extensively explore three different aspects of Born–Infeld (BI)-type nonlinear U(1) gauge-invariant modifications of Maxwell’s classical electrodynamics (also known as BI-type nonlinear electrodynamics) and bring some new perspectives on these theories. First, within the framework of exponential U(1) gauge theory, it is explicitly proved that al...
Hyperbolic vacuum black holes in Lovelock gravity theories of odd order $N$ are known to have the so-called isolated critical points with nonstandard critical exponents (as $\alpha = 0$, $\beta = 1$, $\gamma = N-1$, and $\delta = N$), different from those of mean-field critical exponents (with $\alpha = 0$, $\beta = 1/2$, $\gamma = 1$, and $\delta...
We extensively explore three different aspects of Born-Infeld (BI) type nonlinear $U(1)$ gauge-invariant modifications of Maxwell's classical electrodynamics (also known as BI-type nonlinear electrodynamics) and bring some new perspectives on these theories. First, within the framework of exponential $U(1)$ gauge theory, it is explicitly proved tha...
In the context of black hole chemistry (BHC), holographic phase transitions of asymptotically anti–de Sitter (AdS) charged topological black holes (TBHs) in massive gravity coupled to power Maxwell invariant (PMI) electrodynamics are discussed in the grand canonical (fixed U(1) potential, Φ) ensemble. Considering the higher-order of graviton’s self...
In the context of Black Hole Chemistry (BHC), holographic phase transitions of asymptotically anti-de Sitter (AdS) charged topological black holes (TBHs) in massive gravity coupled to Power Maxwell Invariant (PMI) electrodynamics are discussed in the grand canonical (fixed $U(1)$ potential, $\Phi$) ensemble. Considering all higher-order graviton's...
Massive gravities in anti-de Sitter spacetime can be viewed as effective dual field theories of different phases of condensed matter systems with broken translational symmetry such as solids, (perfect) fluids, and liquid crystals. Motivated by this fact, we explore the black hole chemistry (BHC) of these theories and find a new range of novel phase...
Massive gravities in anti–de Sitter spacetime can be viewed as effective dual field theories of different phases of condensed matter systems with broken translational symmetry such as solids, (perfect) fluids, and liquid crystals. Motivated by this fact, we explore the black hole chemistry (BHC) of these theories and find a new range of novel phase...
In the subject of black hole chemistry, a broad variety of critical phenomena for charged topological black holes (TBHs) with massive gravitons (within the framework of dRGT massive gravity) is discussed in detail. Since critical behavior and the nature of possible phase transition(s) crucially depend on the specific choice of ensemble, and, in ord...
In the subject of black hole chemistry, a broad variety of critical phenomena for charged topological black holes (TBHs) with massive gravitons (within the framework of dRGT massive gravity) is discussed in detail. Since critical behavior and nature of possible phase transition(s) crucially depend on the specific choice of ensemble, and, in order t...
Considering de Rham–Gabadadze–Tolley theory of massive gravity coupled with (ghost free) higher curvature terms arisen from the Lovelock Lagrangian, we obtain charged-AdS black hole solutions in diverse dimensions. We compute thermodynamic quantities in the extended phase space by considering the variations of the negative cosmological constant, Lo...
Considering de Rham-Gabadadze-Tolley theory of massive gravity coupled with (ghost free) higher curvature terms arisen from the Lovelock Lagrangian, we obtain charged AdS black hole solutions in diverse dimensions. We compute thermodynamic quantities in the extended phase space by considering the variations of the negative cosmological constant, Lo...
In this paper, we combine Lovelock gravity with gravity's rainbow to construct Lovelock gravity's rainbow. Considering the Lovelock gravity's rainbow coupled to linear and also nonlinear electromagnetic gauge fields, we present two new classes of topological black hole solutions. We compute conserved and thermodynamic quantities of these black hole...
In this paper, we obtain topological black hole solutions of third order
Lovelock gravity couple with two classes of Born-Infeld type nonlinear
electrodynamics with anti-de Sitter asymptotic structure. We investigate
geometric and thermodynamics properties of the solutions and obtain conserved
quantities of the black holes. We examine the first law...
Citations
... Hence, the study examined the quantum-corrected thermodynamics and statistics of BHs by computing the partition function. There are several recent works about perturbative and non-perturbative corrections in BH thermodynamics that can be used to improve the paper in this regard [91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107][108]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/11431281196243255-1696592452039_Q64/Behnam-Pourhassan.jpg)
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... In addition to the BI theory, some other types of nonlinear electrodynamics such as the exponential and logarithmic forms [13,14] can remove or reduce the singularity of the electric point charge field as well. Within the framework of exponential U (1) gauge theory [15], the results indicate a finite value for the total electrostatic field energy, while the electric field at the location of the elementary point charge is not finite. The authors have proved that BI, logarithmic, and exponential U (1) gauge theories can lead to a finite self-energy in arbitrary dimensions [15]. ...
Reference: Nonlinear Yang-Mills black holes
... Additionally, the most fascinating achievement in modern physics is the bridge between thermodynamics and gravity, which plays a key role to understand more deeply the nature of black holes [1,2]. Especially, the thermodynamic aspects of Anti-de Sitter ( Ad S) spacetimes are largely considered in the literature [3][4][5][6][7][8][9][10], while considering cosmological constant as a thermodynamical variable opens new windows in such area and new phenomena familiar from everyday thermodynamics emerge, such as enthalpy, reentrant phase transitions, triple points, and Carnot cycle have all now entered the language and structure of the subject, broadening it to what is called Black Hole Chemistry [11][12][13][14][15][16][17][18][19][20]. Maybe the only intriguing exception to this similitude is the non-extensive nature of the Bekenstein-Hawking entropy of black holes which is proportional to the surface area of its event horizon rather than the volume. ...
... [45][46][47][48][49][50] Afterwards, a series of interesting phase transitions were discovered in the extended phase space, which include the reentrant phase transition and the triple point. [51][52][53][54][55][56][57][58][59][60][61][62][63][64] For example, Wei et al. demonstrated that there are triple points in 6-dimensional GB AdS BHs, [53][54][55] and Frassino et al. found the reentrant phase transition in 3rd-order Lovelock gravity. [54] In the case of higher-order gravity theories, there are also multicritical phase transitions in AdS BHs, i.e., in higher-order Lovelock gravity. ...
... Additionally, the most fascinating achievement in modern physics is the bridge between thermodynamics and gravity, which plays a key role to understand more deeply the nature of black holes [1,2]. Especially, the thermodynamic aspects of Anti-de Sitter ( Ad S) spacetimes are largely considered in the literature [3][4][5][6][7][8][9][10], while considering cosmological constant as a thermodynamical variable opens new windows in such area and new phenomena familiar from everyday thermodynamics emerge, such as enthalpy, reentrant phase transitions, triple points, and Carnot cycle have all now entered the language and structure of the subject, broadening it to what is called Black Hole Chemistry [11][12][13][14][15][16][17][18][19][20]. Maybe the only intriguing exception to this similitude is the non-extensive nature of the Bekenstein-Hawking entropy of black holes which is proportional to the surface area of its event horizon rather than the volume. ...
... As a result, momentum dissipates as the graviton may behave like a lattice, and it can avoid divergent conductivity. Since then, this Vegh's type of massive gravity, called holographic massive gravity, has been extensively exploited to investigate many interesting models of gravity [97][98][99][100][101][102][103][104][105][106][107][108][109]. Very recently, we have studied the tidal effects [110] and statistical entropy [111] for the Schwarzschild black hole in holographic massive gravity. ...
... The modification to the thermodynamics of Yang-Mills black hole from gravity's rainbow has also been studied [21]. It has been observed that these rainbow functions also modify the black holes in higher curvature gravity in a non-trivial way [22][23][24]. The modification to a dilatonic black hole in gravity's rainbow has also been studied [25]. ...
... On the other hand, the dynamics of electromagnetic fields on the world-volumes of D-branes are governed by BI theory. Since both the Einstein-Hilbert action (in an antide Sitter background) and BI effective action appear at low-energy limit of string theory models, coupling nonlinear electrodynamics to gravity has been found various applications in the literature, especially in the contexts of effective field theories, gauge/gravity duality and black hole physics [8,10,11,22,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. ...
