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Microscopic origin of black hole entropy from tachyon condensation Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-20 Huiquan Li
We show generically that the dynamics of a probe particle near the event horizon of a non-extreme black hole is described by the tachyon effective action. The Hagedorn temperature in the action is always equal to the Hawking temperature of the background black hole. The fact suggests that the infalling particle should decay completely into gravitons or closed strings approaching the event horizon.
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Landauer’s principle and black hole area quantization Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-18 Bijan Bagchi, Aritra Ghosh, Sauvik Sen
This article assesses Landauer’s principle from information theory in the context of area quantization of the Schwarzschild black hole. Within a quantum-mechanical perspective where Hawking evaporation can be interpreted in terms of transitions between the discrete states of the area (or mass) spectrum, we justify that Landauer’s principle holds consistently in the saturated form when the number of
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Mini boson stars in higher dimensions are radially unstable Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-16 Edgardo Franzin
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Sub-annular structure in black hole image from gravitational refraction Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-16 Gaston Giribet, Emilio Rubín de Celis, Pedro Schmied
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Critical gravitational inspiral of two massless particles Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-14 Don N. Page
If two ultrarelativistic nonrotating black holes of masses \(m_1\) and \(m_2\) approach each other with fixed center-of-momentum (COM) total energy \(E = \sqrt{s} \gg (m_1+m_2)c^2\) that has a corresponding Schwarzschild radius \(R = 2GE/c^4\) much larger than the Schwarzschild radii of the individual black holes, here it is conjectured that at the critical impact parameter \(b_c\) between scattering
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Cosmic strings and gravitational waves Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-14 Lara Sousa
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Topological dressing method for the Einstein–Maxwell equations Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-13 Juri Dimaschko
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Extended uncertainty principle via dirac quantization Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-09 Mytraya Gattu, S. Shankaranarayanan
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Role of Durgapal-Fuloria model on isotropic spheres in rastall gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-03 Arfa Waseem, Sunaiha Naeem
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Correction: Neutron star merger remnants Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-09-03 Sebastiano Bernuzzi
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Instabilities of black holes in Einstein-scalar–Gauss–Bonnet theories Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-31 Jose Luis Blázquez-Salcedo, Burkhard Kleihaus, Jutta Kunz
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Light-cone cuts and metricity conditions for a power-law spacetime in 2+1 and 3+1 dimensions Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-30 Tina A. Harriott, J. G. Williams
The null-surface formulation (NSF) of general relativity differs markedly from the conventional approach. The conventional approach to general relativity is concerned with local fields such as the metric, whereas the NSF focuses on surfaces. The NSF has two distinct but mathematically equivalent interpretations: (a) Future-directed light rays leave a spacetime point and intersect future null-infinity
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Faraday effect of light caused by plane gravitational wave Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-21 Andrey A. Shoom
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Generalized entropy in higher curvature gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-17 Vardarajan Suneeta
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Resummation of local and non-local scalar self energies via the Schwinger–Dyson equation in de Sitter spacetime Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-14 Sourav Bhattacharya, Nitin Joshi, Kinsuk Roy
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Causal sets and an emerging continuum Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-14 S. Carlip
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Exploring the phase transition in charged Gauss–Bonnet black holes: a holographic thermodynamics perspectives Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-13 Jafar Sadeghi, Mohammad Reza Alipour, Mohammad Ali S. Afshar, Saeed Noori Gashti
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Killing invariants: an approach to the sub-classification of geometries with symmetry Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-10 C. Brown, M. Gorban, W. Julius, R. Radhakrishnan, G. Cleaver, D. McNutt
In principle, the local classification of spacetimes is always possible using the Cartan-Karlhede algorithm. However, in practice, the process of determining equivalence of two spacetimes relies on determining if a set of equations has a solution. Depending on the form of the equations this may be undecideable. Furthemore, if a solution does exist the equations may still be unsolvable in some way.
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Influence of the cosmological constant on $$\kappa $$ -deformed neutron star Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-08-08 R. Bhagya, Diganta Parai, Harsha Sreekumar, Suman Kumar Panja
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Localized chaos due to rotating shock waves in Kerr–AdS black holes and their ultraspinning version Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-29 Hadyan Luthfan Prihadi, Freddy Permana Zen, Donny Dwiputra, Seramika Ariwahjoedi
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Elementary considerations on gravitational waves from hyperbolic encounters Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-27 Martin Teuscher, Aurélien Barrau, Killian Martineau
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Approximating photon trajectories in spherically symmetric spacetimes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-24 Joseph Sultana
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Exponential correction to Friedmann equations Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-18 Özgür Ökcü, Ekrem Aydiner
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Some remarks on Bardeen-AdS black hole surrounded by a fluid of strings Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-12 F. F. Nascimento, Pedro H. Morais, J. M. Toledo, V. B. Bezerra
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4D Einstein–Gauss–Bonnet cosmology with Chameleon mechanism Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-08 Andronikos Paliathanasis
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The d’Alembert solution in hyperboloidal foliations Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-08 Juan A. Valiente Kroon, Lidia J. Gomes Da Silva
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Effeciency of higher dimensional black holes as particle accelerators Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-05 Fatemeh Behdadkia, Behrouz Mirza, Masoumeh Tavakoli
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Cosmological constraints in symmetric teleparallel gravity with bulk viscosity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-05 Dheeraj Singh Rana, P. K. Sahoo
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A dynamical system analysis of bouncing cosmology with spatial curvature Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-06 Soumya Chakraborty, Sudip Mishra, Subenoy Chakraborty
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Nonassociative Einstein–Dirac–Maxwell systems and R-flux modified Reissner–Nordström black holes and wormholes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-04 Laurenţiu Bubuianu, Julia O. Seti, Sergiu I. Vacaru, Elşen Veli Veliev
We elaborate on a model of nonassociative and noncommutative Einstein–Dirac–Maxwell, EDM, theory determined by star product R-flux deformations in string theory. Solutions for nonassociative EDM systems and physical properties not studied in modern physics. For modifications of the four-dimensional, 4-d, Einstein gravity, we work on conventional nonassociative 8-d phase spaces modelled as star-deformed
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A study of interacting NTADE and SMHDE models via cosmological parameters within rastall gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-02 Rabia Saleem, Shan Ali, M. Israr Aslam
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Spherical orbits around Kerr–Newman and Ghosh black holes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-02 A. S. Alam, L. C. Andaru, B. N. Jayawiguna, H. S. Ramadhan
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New exact solutions, thermodynamics and phase transition in the Einstein–Maxwell-dilaton theory Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-07-01 R. Baghbani, M. Dehghani
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Unraveling the mysteries of wormhole formation in Rastall–Rainbow gravity: a comprehensive study using the embedding approach Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-25 Abdelghani Errehymy, Ayan Banerjee, Orhan Donmez, Mohammed Daoud, Kottakkaran Sooppy Nisar, Abdel-Haleem Abdel-Aty
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Absorption, scattering, quasinormal modes and shadow by canonical acoustic black holes in Lorentz-violating background Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-17 J. A. V. Campos, M. A. Anacleto, F. A. Brito, E. Passos
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Cosmological fluids with boundary term couplings Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-18 Christian G. Böhmer, Antonio d’Alfonso del Sordo
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Complete solution of the Einstein field equations for a spherical shell of truly incompressible liquid Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-14 Jorge L. deLyra
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A possible quantum effect of gravitation Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-10 Jarmo Mäkelä
Beginning from the standard Arnowitt–Deser–Misner (ADM) formulation of general relativity we construct a tentative model of quantum gravity from the point of view of an observer with constant proper acceleration, just outside of a horizon of spacetime. In addition of producing the standard results of black-hole thermodynamics, our model makes an entirely new prediction that there is a certain upper
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Canonial analysis of general relativity formulated with the new metric $$f^{ab}=(-g)^{\alpha }g^{ab}$$ Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-08 J. Klusoň
In this short note we investigate canonical formalism for General Relativity which is formulated with the metric \(f^{ab}=(-g)^\alpha g^{ab}\). We find corresponding Hamiltonian and we show that constraint structure is the same as in the standard formulation. We also analyze another model when the spatial part of metric \(h^{ij}\) is related with the new one by relation \(a^{ij}=(\det h_{ij})^\beta
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Optimization of entanglement depends on whether a black hole is extremal Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-06-04 Subhajit Barman, Bibhas Ranjan Majhi
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Free scalar field theory on a Sobolev space over a bounded interval Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-30 J. Fernando Barbero G.
This paper discusses several functional analytic issues relevant for field theories in the context of the Hamiltonian formulation for a free, massless, scalar field defined on a closed interval of the real line. The fields that we use belong to a Sobolev space with a scalar product. As we show this choice is useful because it leads to an explicit representation of the points in the fibers of the phase
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Interior spacetimes sourced by stationary differentially rotating irrotational cylindrical fluids: anisotropic pressure Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-27 Marie-Noëlle Célérier
In a recent series of papers new exact analytical interior spacetimes sourced by stationary rigidly rotating cylinders of fluids have been displayed. A fluid with an axially directed pressure has been first considered, then a perfect fluid, followed by a fluid with an azimuthally directed pressure, and, finally, by a fluid where the pressure is radially oriented. The perfect fluid configuration has
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Adiabatic theory in Kerr spacetimes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-26 Kuantay Boshkayev, Gulmira Nurbakyt, Hernando Quevedo, Gulnara Suliyeva, Abylaykhan Tlemissov, Zhanerke Tlemissova, Anar Dalelkhankyzy, Aliya Taukenova, Ainur Urazalina, Zdenek Stuchlík, Nurzada Beissen, Sholpan Gumarova
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Hamiltonian analysis and Faddeev–Jackiw formalism for two dimensional quadratic gravity expressed as BF theory Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-24 Jaime Manuel Cabrera, Jorge Mauricio Paulin Fuentes
We examine the model of two-dimensional quadratic gravity as a consequence of symmetry breaking within the framework of background field (BF) theory. This theory is essentially an extension of BF theory, introducing an additional polynomial term that operates on both the gauge and background fields. We analyze the theory using the Dirac and Faddeev–Jackiw procedures, determining the form of the gauge
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The Euclidean-hyperboloidal foliation method: application to f(R) modified gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-25 Philippe G. LeFloch, Yue Ma
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Modified FRW cosmology with massive gravity in the spectrum of the rainbow Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-23 Muhammad Naeem, Aysha Bibi
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A generalization of the Hawking black hole area theorem Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-21 Eleni-Alexandra Kontou, Veronica Sacchi
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Extended Bose–Einstein condensate dark matter in f(Q) gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-22 Aaqid Bhat, Raja Solanki, P. K. Sahoo
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Turnaround Radius for charged particles in the Reissner–Nordström deSitter spacetime Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-20 Ethan J. German, Joseph Sultana
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Photon ring bounds of scalar hairy charged black holes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-15 Yun Soo Myung
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The generalized Vaidya spacetime with polytropic equation of state Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-14 Vitalii Vertogradov
The process of the gravitational collapse might lead not only to a black hole but also to naked singularity formation. In this paper, we consider the generalized Vaidya spacetime with polytropic and generalized polytropic equations of state. We solve the Einstein and Einstein–Maxwell equations to obtain the explicit form of a mass function. We consider the limiting cases of solutions and find out,
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Galactic microlensing by backreacted massless wormholes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-13 G. F. Akhtaryanova, R. Kh. Karimov, R. N. Izmailov, K. K. Nandi
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Quantum and higher curvature corrections to the anti-de Sitter black hole Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-08 Kristian Hauser Villegas, Reginald Christian Bernardo
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Signatures of quantum geometry from exponential corrections to the black hole entropy Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-09 Soham Sen, Ashis Saha, Sunandan Gangopadhyay
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$$\delta \mathcal {N}$$ formalism on the past light-cone Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-05 Giuseppe Fanizza, Giovanni Marozzi, Matheus Medeiros
We apply the gradient expansion approximation to the light-cone gauge, obtaining a separate universe picture at non-linear order in perturbation theory within this framework. Thereafter, we use it to generalize the \(\delta \mathcal {N}\) formalism in terms of light-cone perturbations. As a consistency check, we demonstrate the conservation of the gauge invariant curvature perturbation on uniform density
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Local first law of black hole Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-07 Pabitra Tripathy, Pritam Nanda, Amit Ghosh
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Distinguishing cosmological models through quantum signatures of primordial perturbations Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-05-08 Rathul Nath Raveendran, Sumanta Chakraborty
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Novel regular black holes: geometry, source and shadow Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-29 Anjan Kar, Sayan Kar
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Granda–Oliveros dark energy in non-conserved gravity theory Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-27 H. R. Fazlollahi
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Review on the matching conditions for the tidal problem: towards the application to more general contexts Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-22 Eneko Aranguren, Raül Vera