Anisotropic matter and nonlinear electromagnetics black holesIt is shown that anisotropic matter black holes with two parameters w and K correspond to nonlinear electrodynamics (NED) black holes with power-index s and charge term ξ(s,q) by introducing…Yun Soo Myung, Wonwoo Lee·May 18, 2026SaveLearn
The effects of dark energy on the matter-gravity couplingDark energy perturbations are expected to modify the evolution of cosmological perturbations, producing different observational effects. We show that these effects can be encoded in a momentum, space…Antonio Enea Romano·May 18, 2026SaveLearn
Testing the consistency of gravitational waves and large scale structure constraints on dark energyGravitational wave (GW) astronomy has opened a new window on the Universe, allowing to obtain constraints on dark energy and gravity independent from other electromagnetic waves observations, such as…Antonio Enea Romano, Juan Manuel Cardenas Mancipe·May 18, 2026SaveLearn
Classical and Semiclassical Stability of Emergent Universes in Jordan-Brans-Dicke TheoryThe Emergent Universe scenario is based on the assumption that the universe originates from a past-eternal Einstein static (ES) state, subsequently evolving toward an inflationary phase and a hot Big…Pedro Labraña, Juan Ortiz·May 18, 2026SaveLearn
Rotating Black Holes Surrounded by Massive Vector Fields in Kaluza Klein GravityIn this paper, we introduce a rotating Kaluza-Klein black hole characterized by a massive vector field and a scalar field. We begin by identifying the horizons and mapping the allowed parameter space…Farokhnaz Hosseinifar, Shahin Mamedov, Kuantay Boshkayev et al.·May 17, 2026SaveLearn
Scattering, absorption and greybody factor of scalar particles by Lorentz-violating charged black holesIn this work, we investigate the scattering and absorption of spin 0 particles for electrically charged black holes in two gravity models with spontaneous Lorentz symmetry breaking. The first one is…F. M. Belchior·May 17, 2026SaveLearn
Junction Conditions and Gravitational Collapse in Scalar-Tensor-Vector GravityWe formulate the junction conditions for Scalar-Tensor-Vector Gravity (STVG/MOG), proposed by J.~W.~Moffat. Using these conditions, the theory of gravitational collapse is constructed. In the…Debanjan Debnath, Anant Badal, Kaushik Bhattacharya·May 17, 2026SaveLearn
Dynamic Aspects of Bumblebee Gravity: Post-Newtonian ApproachIn this work, we investigate the dynamic aspects of Bumblebee gravity via the parameterized post-Newtonian method. We find that the PPN framework is self-consistent up to 1.5PN order if and only if…Jie Zhu, Hao Li·May 17, 2026SaveLearn
Joule-Thomson effect and Efficiency of deformed AdS-Schwarzschild black hole in presence of quintessenceWe study the Joule-Thomson expansion and extended thermodynamics of a modified black hole characterised by the parameters α, β, and σ. Analysis of the Hawking temperature, Joule-Thomson…Dhruba Jyoti Gogoi, Ronit Karmakar, Jyatsnasree Bora et al.·May 17, 2026SaveLearn
From minimal-length quantum theory to modified gravityIn this work, we consider generalized uncertainty principles (GUPs) that incorporate a minimal length through generic momentum-dependent deformation functions. We thus develop a systematic approach…Rocco D'Agostino, Pasquale Bosso, Giuseppe Gaetano Luciano·May 17, 2026SaveLearn
Improving Slow-Roll Estimates in Starobinsky Inflation Using Analytic Hubble ParameterPotential slow-roll parameters are widely used in inflationary cosmology to estimate the scalar and tensor perturbation amplitudes and the scalar spectral index, although the inflationary observables…Jose Mathew·May 17, 2026SaveLearn
Boson Stars surrounded by Polish Doughnuts in Scalar-Tensor TheoryWe investigate thick accretion disks (Polish Doughnuts) around rotating self-interacting boson stars in general relativity and scalar-tensor theories, focusing on spontaneously scalarized solutions…Kristian Gjorgjieski, Maxim Rose, Burkhard Kleihaus et al.·May 16, 2026SaveLearn
Reconstruction of Tsallis Holographic Dark Energy via Modified Non-Metric Gravity: An f(Q,C) ApproachIn the current research, we have reported the Tsallis Holographic Dark Energy (THDE) (JCAP, 2018(12), p.012.) model reconstructed within the framework of f(Q, C) gravity (JCAP,…Sanjeeda Sultana, Surajit Chattopadhyay·May 16, 2026SaveLearn
Warm inflation in Weyl geometric gravityWe investigate the warm inflationary scenario in the Weyl geometric gravity theory, in which the action is constructed by adding matter to the simplest conformally invariant gravitational action in…Runhua Huang, Tiberiu Harko, Shi-Dong Liang et al.·May 16, 2026SaveLearn
Constraints on non-canonical chaotic inflation from ACT DR6 and BICEP/Keck dataIn this study, we precisely evaluated the feasibility of the chaotic inflation model within a non-canonical kinetic framework. By applying the slow-roll approximation and imposing constraints on the…Wei Yang, Chen-Hao Wu, Ya-Peng Hu·May 16, 2026SaveLearn
Spatial curvature in Unimodular GravityWe investigate the cosmological implications of unimodular gravity (UG) featuring energy diffusion and spatial curvature. While standard diffusion models often suffer from thermodynamic…Gilberto Aguilar-Pérez, Miguel Cruz, Samuel Lepe·May 16, 2026SaveLearn
Generic Peculiar Motions in FLRW SpacetimesIn the standard Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime, we consider a local cosmic test mass that is boosted in some direction relative to the standard comoving observers. The geodesic…Bahram Mashhoon·May 16, 2026SaveLearn
Propagation effects of Lorentz violation in gravitational wavesWe investigate the propagation of gravitational waves in the presence of Lorentz- and diffeomorphism-violating operators within the linearized gravitational sector of the Standard Model Extension.…A. A. Araújo Filho, N. Heidari, Iarley P. Lobo·May 16, 2026SaveLearn
Finite time pseudo-rip singularity in cosmologyBy studying first a new decelerating sudden future singularity (SFS) universe we report finding a novel type of cosmological singularity which we dub a finite time pseudo-rip (FTPR) because unlike…Mariusz P. Dąbrowski, Teodor Borislavov Vasilev·May 16, 2026SaveLearn
Light Rings, Accretion Disks and Shadows of Hayward Boson StarsIn this paper, we investigate the Einstein-Hayward gravity coupled to a complex scalar field without self-interaction. Using numerical methods, we construct a class of Hayward boson star solutions…Zhen-Hua Zhao, Yi-Ning Gu, Shu-Cong Liu et al.·May 16, 2026SaveLearn
Quantum corrections to cosmic perturbations for a bouncing backgroundWe compute second-order quantum dispersions and correlations corrections, within an effective framework describing a single scalar perturbation mode propagating on a bouncing Loop Quantum Cosmology…Héctor Hernández-Hernández, Hugo A. Morales-Técotl, Gustavo Sánchez-Herrera·May 15, 2026SaveLearn
Quantum-statistical constraints on Kerr-anti-de Sitter thermodynamicsWe develop a general framework for interpreting the thermodynamic descriptions of Kerr-anti de Sitter black holes (KadS). These descriptions satisfy a first law and respect the homogeneity required…T. L. Campos, M. C. Baldiotti, C. Molina·May 15, 2026SaveLearn
Bidirectional Internal Squeezing for Gravitational-Wave DetectorsWe present a bidirectional internal squeezing scheme for gravitational-wave detectors and show that it saturates the lowest known lower bounds on quantum noise from internal optical dissipation. The…Sander M. Vermeulen, Umran Serra Koca, Lee McCuller·May 15, 2026SaveLearn
Dynamical quasinormal mode excitation II: propagation and convergence in SchwarzschildWe study the dynamical excitation of quasinormal modes (QNMs) during the plunge of a particle into a Schwarzschild black hole, building on the framework of Phys. Rev. D 113 (2026) 2, 024048 (Paper…Marina De Amicis, Enrico Cannizzaro, Gregorio Carullo et al.·May 15, 2026SaveLearn
Particle Dynamics, Shadow and Hawking Sparsity of a Kalb-Ramond Black Hole Coupled to Nonlinear ElectrodynamicsWe study the timelike and null geodesic structure of a static, spherically symmetric black hole sourced by a Kalb--Ramond (KR) field coupled to nonlinear electrodynamics (NED). The geometry is…Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı·May 15, 2026SaveLearn