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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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Post-Newtonian theory for gravitational waves Living Rev. Relat. (IF 26.3) Pub Date : 2024-07-10 Luc Blanchet
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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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Theoretical and experimental constraints for the equation of state of dense and hot matter Living Rev. Relat. (IF 26.3) Pub Date : 2024-06-05 Rajesh Kumar, Veronica Dexheimer, Johannes Jahan, Jorge Noronha, Jacquelyn Noronha-Hostler, Claudia Ratti, Nico Yunes, Angel Rodrigo Nava Acuna, Mark Alford, Mahmudul Hasan Anik, Debarati Chatterjee, Katerina Chatziioannou, Hsin-Yu Chen, Alexander Clevinger, Carlos Conde, Nikolas Cruz-Camacho, Travis Dore, Christian Drischler, Hannah Elfner, Reed Essick, David Friedenberg, Suprovo Ghosh, Joaquin Grefa
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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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Hamiltonian formulation of general relativity and post-Newtonian dynamics of compact binaries Living Rev. Relat. (IF 26.3) Pub Date : 2024-05-03 Gerhard Schäfer, Piotr Jaranowski
Hamiltonian formalisms provide powerful tools for the computation of approximate analytic solutions of the Einstein field equations. The post-Newtonian computations of the explicit analytic dynamics and motion of compact binaries are discussed within the most often applied Arnowitt–Deser–Misner formalism. The obtention of autonomous Hamiltonians is achieved by the transition to Routhians. Order reduction
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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
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The role of dimension and electric charge on a collapsing geometry in Einstein–Gauss–Bonnet gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-18 Byron P. Brassel
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General relativistic approach to the vis-viva equation on Schwarzschild metric Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-15 Qi Peng, Shuichiro Yokoyama, Kiyotomo Ichiki
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Relativistic correction to black hole entropy Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-13 Naman Kumar
In this paper, we study the relativistic correction to Bekenstein–Hawking entropy in the canonical ensemble and isothermal–isobaric ensemble and apply it to the cases of non-rotating BTZ and AdS-Schwarzschild black holes. This is realized by generalizing the equations obtained using Boltzmann–Gibbs (BG) statistics with its relativistic generalization, Kaniadakis statistics, or \(\kappa \)-statistics
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Three-dimensional AdS black holes in massive-power-Maxwell theory Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-12 B. Eslam Panah, K. Jafarzade, Á. Rincón
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Physical analysis of spherical stellar structures in $$f(\textrm{Q},\textrm{T})$$ theory Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-09 M. Zeeshan Gul, M. Sharif, Adeeba Arooj
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On the weak and strong field effects in antiscalar background Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-08 Eduard Mychelkin, Maxim Makukov, Gulnara Suliyeva, Nosratollah Jafari
The triumph of general relativity under the banner “gravity is geometry” began with confirming the crucial effects within the Solar system and proceeded recently to the strong-field shadow effect for the compact object in the center of the Milky Way. Here, we examine some of those phenomena for the Einstein-scalar equations in the antiscalar regime to reveal the difference from vacuum both in weak
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Compact stars in Rastall gravity: hydrostatic equilibrium and radial pulsations Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-06 Juan M. Z. Pretel, Clésio E. Mota
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A novel model of non-singular oscillating cosmology on flat Randall–Sundrum II braneworld Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-06 Rikpratik Sengupta
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More solutions for the Wheeler–DeWitt equation in a flat FLRW minisuperspace Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-04 Chia-Min Lin
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Compactness bound of Buchdahl–Vaidya–Tikekar anisotropic star in $$D\ge 4$$ dimensional spacetime Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-04-04 Samstuti Chanda, Ranjan Sharma
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Quantum kinetic approach to the Schwinger production of scalar particles in an expanding universe Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-03-29 Anastasia V. Lysenko, Oleksandr O. Sobol
We study the Schwinger pair creation of scalar charged particles by a homogeneous electric field in an expanding universe in the quantum kinetic approach. We introduce an adiabatic vacuum for the scalar field based on the Wentzel–Kramers–Brillouin solution to the mode equation in conformal time and apply the formalism of Bogolyubov coefficients to derive a system of quantum Vlasov equations for three
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Renormalized stress-energy tensor on global anti-de Sitter space-time with Robin boundary conditions Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-03-28 Thomas Morley, Sivakumar Namasivayam, Elizabeth Winstanley
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Investigating the physical properties of traversable wormholes in the modified f(R, T) gravity Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-03-19 Jianbo Lu, Mou Xu, Jing Guo, Ruonan Li
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Interaction of gravitational waves with Yang–Mills fields Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-03-01 Narasimha Reddy Gosala, Arundhati Dasgupta
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Beyond Schwarzschild: new pulsating coordinates for spherically symmetric metrics Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-02-29 E. A. León, J. A. Nieto, A. Sandoval-Rodríguez, B. Martínez-Olivas
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Quasinormal modes of anyons Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-02-24 Vishnulal Cheriyodathillathu, Saurya Das, Soumen Basak
We derive the quasinormal modes of anyons for \((2+1)\)-dimensional Bañados, Teitelboim, and Zanelli (BTZ) and analogue black holes and discuss potential experiments to measure these modes.
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Vector bosons in the rotating frame of negative curvature wormholes Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-02-23 Abdullah Guvendi, Semra Gurtas Dogan
In this study, we investigate the relativistic dynamics of vector bosons within the context of rotating frames of negative curvature wormholes. We seek exact solutions for the fully-covariant vector boson equation, derived as an excited state of zitterbewegung. This equation encompasses a symmetric rank-two spinor, enabling the derivation of a non-perturbative second-order wave equation for the system
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Relativistic and nonrelativistic Landau levels for the noncommutative quantum Hall effect with anomalous magnetic moment in a conical Gödel-type spacetime Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-02-21 R. R. S. Oliveira
In this paper, we analyze the relativistic and nonrelativistic energy spectra (fermionic Landau levels) for the noncommutative quantum Hall effect with anomalous magnetic moment in the conical Gödel-type spacetime in \((2+1)\)-dimensions, where such spacetime is the combination of the flat Gödel-type spacetime with a cosmic string (conical gravitational topological defect). To analyze these energy
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Varying vacuum models with spatial curvature: a dynamical system perspective Gen. Relativ. Gravit. (IF 2.1) Pub Date : 2024-02-21 Ashutosh Singh, Syamala Krishnannair