Article
Physics, Mathematical
Shin'ichi Nojiri, Sergei D. D. Odintsov, Valerio Faraoni
Summary: The Bekenstein-Hawking entropy of a black hole is constant in two-dimensional spacetime dimensions due to the degeneration of the horizon into two points. This is consistent with the topological nature of Einstein's gravity in two dimensions. In F(R) gravity and Jackiw-Teitelboim gravity, which are equivalent to two-dimensional F(R) gravity, the entropy also remains constant. However, in two-dimensional dilaton gravity, the entropies are not always constant and can depend on the mass, horizon radius, or Hawking temperature, leading to new proposals for a generalized entropy.
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Wan Cong, David Kubiznak, Robert B. Mann
Summary: We reconsider the thermodynamics of anti-de Sitter black holes in the context of gauge-gravity duality, rewriting the first law in a new form containing both thermodynamic pressure and the central charge C of the dual conformal field theory and their conjugate variables. The obtained novel thermodynamic volume leads to a new understanding of the Van der Waals behavior of charged anti-de Sitter black holes, with phase changes governed by the degrees of freedom in the conformal field theory. The new criticality is universal and directly relates to the thermodynamics of the dual field theory and its central charge, unlike the old P-V criticality.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Alena Pravdova, Vojtech Pravda, Marcello Ortaggio
Summary: In this article, we investigate static black holes in quadratic gravity with planar and hyperbolic symmetry and non-extremal horizons. We find a solution in terms of an infinite power-series expansion around the horizon, characterized by two independent integration constants - the black hole radius and the strength of the Bach tensor at the horizon. Unlike in Einstein's gravity, these black holes can exist for any sign of the cosmological constant A and also for A = 0. We identify different branches of Schwarzschild-Bach-(A)dS or purely Bachian black holes, which have distinct Einstein limits depending on the curvature of the transverse space and the value of A.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Zhan-Feng Mai, Rui Xu, Dicong Liang, Lijing Shao
Summary: In this paper, the local thermodynamic properties of numerical spherical black holes in the bumblebee theory are investigated and a new first law of thermodynamics for bumblebee black holes is constructed. For different values of the nonminimal coupling coefficient, both divergent and smooth phase transitions are found. It is observed that there exists a critical value for the nonminimal coupling coefficient, beyond which the bumblebee black holes become locally thermodynamically unstable.
Article
Astronomy & Astrophysics
Nikolay Bobev, Vasil Dimitrov, Valentin Reys, Annelien Vekemans
Summary: Using recent results in four-derivative 5d N = 2 minimal gauged supergravity, the regularized on-shell action of the Euclidean solution in this theory that admits a Lorentzian continuation to an AdS(5) black hole with one electric charge and two angular momenta is evaluated. It is shown that the supersymmetric limit of this solution can be described purely in terms of angular momentum fugacities and the 't Hooft anomalies for the U(1)(R) R symmetry of the dual 4d N = 1 superconformal field theory using holography. This holographic calculation is in perfect agreement with recent studies of the 4d N = 1 superconformal index on the second sheet. Additionally, the leading four-derivative corrections to the Bekenstein-Hawking entropy are explicitly calculated for the black hole solution.
Article
Physics, Multidisciplinary
Gamal G. L. Nashed, Kazuharu Bamba
Summary: By exploring the rotating black hole solutions in N-dimensions with specific parameters and studying the relationships between physical quantities, we investigated the effects of the parameter b on black holes in multi-dimensional cases depend on the contribution of the correction R-2 term. Through calculating thermodynamic quantities and analyzing stability, we demonstrated that these black hole solutions exhibit thermodynamic stability.
Article
Physics, Multidisciplinary
Xiangqing Kong, Tao Wang, Zeyuan Gao, Liu Zhao
Summary: The recently proposed restricted phase space thermodynamics is shown to be applicable to a large class of higher dimensional higher curvature gravity models coupled to Maxwell field, which are known as black hole scan models. Three example cases, Einstein-Hilbert, Born-Infield, and Chern-Simons-like gravity models, were studied in detail. The study indicates that the Einstein-Hilbert and Born-Infield like models have similar thermodynamic behaviors, while the Chern-Simons-like model behaves differently.
Article
Astronomy & Astrophysics
Yun Soo Myung, De-Cheng Zou
Summary: The study examines scalarization of slow rotating black holes in the Einstein-scalar-Gauss-Bonnet-Chern-Simons theory. It shows tachyonic instability for slow rotating black holes, indicating the onset of spontaneous scalarization. Results reveal instability against spherically symmetric scalar mode propagation for positive coupling alpha, while no tachyonic instability is found for negative coupling alpha.
Article
Astronomy & Astrophysics
Davide Cassani, Jerome P. Gauntlett, Dario Martelli, James Sparks
Summary: The study focuses on the thermodynamics of AdS(4) black hole solutions of Einstein-Maxwell theory, analyzing accelerating, rotating, and charged black holes. By using holography, the Euclidean on-shell action is calculated and a set of conserved charges are defined to establish the first law. By identifying a complex locus of supersymmetric and nonextremal solutions through an analytic continuation of parameters, a simple expression for the on-shell action is obtained, leading to the Bekenstein-Hawking entropy for a class of supersymmetric and extremal black holes.
Article
Astronomy & Astrophysics
Brayden Hull, Robert B. Mann
Summary: In this study, the thermodynamics of a new class of asymptotically anti-de Sitter black holes with nonconstant curvature event horizons in Gauss-Bonnet Lovelock gravity are examined, with the cosmological constant acting as thermodynamic pressure. It is found that nontrivial curvature on the horizon can significantly affect their thermodynamic behavior, and novel triple points are observed in six dimensions between large and small uncharged black holes and thermal AdS. For charged black holes, a continuous set of triple points is found, with the range depending on the parameters in the horizon geometry. Additionally, new generalizations of massless and negative mass solutions previously observed in Einstein gravity are also identified.
Article
Astronomy & Astrophysics
Li Li
Summary: The presence of a scalar hair in black holes leads to an additional contribution to the first law of black hole thermodynamics, which requires modification including new thermodynamic conjugate variables phi(s) and (O). The study provides a deeper understanding of the thermodynamics of AdS black holes in Einstein-scalar gravity and sheds light on the behavior of the scalar field near the AdS boundary.
Article
Astronomy & Astrophysics
Di Wu, Shuang-Qing Wu
Summary: In this paper, we investigate the topological numbers of various black holes, including the singly rotating Kerr-AdS black holes in all dimensions, the four-dimensional Kerr-Newman-AdS black hole, and the three-dimensional Banados-Teitelboim-Zanelli black hole, while considering the influence of the cosmological constant and spacetime dimension. We find that the topological numbers of black holes are significantly affected by the cosmological constant and that the dimension of spacetimes plays a crucial role in determining the topological number for rotating AdS black holes. Furthermore, we make an interesting observation that the topological number of the AdS black hole is always one unit different from that of its corresponding asymptotically flat black hole, which leads us to propose a novel conjecture that needs further verification in future research on various black holes and their AdS counterparts.
Article
Physics, Particles & Fields
Yun-Zhi Du, Huai-Fan Li, Li-Chun Zhang
Summary: This paper investigates the thermodynamic properties of higher-dimensional dS spacetime embedded with black holes, revealing the characteristics of phase transition and exploring the distinct dynamical behavior compared to AdS black holes.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Alex Davey, Oscar J. C. Dias, Paul Rodgers, Jorge E. Santos
Summary: This article discusses the violations and respects of Strong Cosmic Censorship (SCC) in different types of black holes in various spacetime dimensions. It also explores the characteristics of the scalar field quasinormal mode spectra related to SCC.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Bikash Chandra Paul
Summary: We generalize Dymnikova black hole solutions in higher dimensions for both Einstein's general theory of relativity (GR) and Rastall theory. The non-singular black hole solution in GR is presented in the framework of higher dimensional GR and Rastall theory, with a finite radial pressure and a set of model parameter determined transverse pressure at the center. The solutions reduce to the singularity-free Schwarzschild black hole as the spacetime dimension increases.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Astronomy & Astrophysics
Brian P. Dolan
MODERN PHYSICS LETTERS A
(2015)
Article
Astronomy & Astrophysics
Brian P. Dolan
Correction
Astronomy & Astrophysics
Brian P. Dolan
CLASSICAL AND QUANTUM GRAVITY
(2014)
Article
Astronomy & Astrophysics
Brian P. Dolan
CLASSICAL AND QUANTUM GRAVITY
(2014)
Article
Astronomy & Astrophysics
Brian P. Dolan
CLASSICAL AND QUANTUM GRAVITY
(2014)
Article
Astronomy & Astrophysics
Brian P. Dolan, Anna Kostouki, David Kubiznak, Robert B. Mann
CLASSICAL AND QUANTUM GRAVITY
(2014)
Article
Physics, Multidisciplinary
Brian P. Dolan
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2014)
Article
Astronomy & Astrophysics
Brian P. Dolan
Article
Physics, Particles & Fields
Brian P. Dolan
JOURNAL OF HIGH ENERGY PHYSICS
(2014)
Article
Astronomy & Astrophysics
Brian P. Dolan
CLASSICAL AND QUANTUM GRAVITY
(2019)
Article
Physics, Multidisciplinary
Brian P. Dolan, Aonghus Hunter-McCabe, Jason Twamley
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Brian P. Dolan, Aonghus Hunter-McCabe
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2020)
Article
Physics, Multidisciplinary
Brian P. Dolan
Summary: The study focuses on faithful representations of discrete Lorentz symmetry operations, specifically looking at complex phases in fermions. The rational multiples of pi for complex phases are shown to generate different groups, such as dicyclic and cyclic groups. The article also discusses the possibility of neutral pseudo-scalar mesons being eigenstates of C, P, and T.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Physics, Particles & Fields
Brian P. Dolan
Summary: The temperature dependence of quantum Hall conductivities was studied in the context of the AdS/CMT paradigm, using a model with a bulk theory containing a negative cosmological constant and Lifshitz-like geometry. It was found that the temperature dependence of the infra-red conductivities is linked to modular forms. Remarkable agreement was observed between the resulting flow diagrams and existing experimental data on the temperature flow of both integral and fractional quantum Hall conductivities.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)