Effective Improved-GUP Cosmology: Emergent FLRW Universe without a BounceWe investigate the effective dynamics of a spatially flat FLRW universe coupled to a massless scalar field by applying the improved generalized uncertainty principle (GUP)-inspired deformations to…Saeed Rastgoo, Wilfredo Yupanqui·Apr 7, 2026SaveLearn
Gauge Theoretic Signal Processing I: The Commutative Formalism for Single-Detector Adaptive WhiteningWe present a geometric framework for adaptive whitening in gravitational-wave detectors, reformulating the problem from a sequence of spectral factorizations to parallel transport on a principal…James Kennington, Joshua Black·Apr 7, 2026SaveLearn
Black Hole-Boson Star Binaries: Gravitational Wave Signals and Tidal DisruptionWe present a detailed, fully nonlinear study of binary systems involving one black hole and one boson star, considering the effects of both a quartic self-interaction and a solitonic potential for…Gareth Arturo Marks, Seppe J. Staelens, Ulrich Sperhake·Apr 7, 2026SaveLearn
A note on the instability of the Kerr Cauchy horizon under linearised gravitational perturbationsThis note slightly strengthens the result of arXiv:2201.12295 on the linear instability of the Kerr Cauchy horizon. This strengthened result is used in the proof arXiv:2604.04877 of the non-linear…Jan Sbierski·Apr 7, 2026SaveLearn
A Survey through Conformal TimeWe revisit conformal time η in a spatially flat Friedmann--Robertson--Walker universe and use a 1+1-dimensional setting as a technically transparent pedagogical arena. Our purpose is to clarify…Tahereh Aeenehvand, Ahmad Shariati·Apr 7, 2026SaveLearn
Algebraic approach to quantum gravity IV: applicationsWe provide a relatively self-contained introduction to the application of quantum spacetime and quantum Riemannian geometry to theoretical physics. Recent successes include calculation of the vacuum…Shahn Majid·Apr 7, 2026SaveLearn
Self-gravitating thin shells are dynamically unstable on all angular scalesWe establish the dynamical instability of a static, spherically symmetric, and infinitesimally thin shell in general relativity. The shell is made up of a perfect fluid with a barotropic equation of…Tristan Pitre, Berend Schneider, Eric Poisson·Apr 7, 2026SaveLearn
Probabilistic Evolution of Black Hole Thermodynamic States via Fokker-Planck EquationEmploying the generalized free energy landscape and solving the associated Fokker-Planck equation, we obtain the time-dependent probability evolution of the order parameter for the RN-AdS black hole…Chao Wang, Chen Ma, Meng-Ci He et al.·Apr 7, 2026SaveLearn
Strong Lensing and Quasinormal modes of black hole around global monopoleIn this paper, we investigate various key aspects of a static and spherically symmetric black hole with global monopole. Firstly, we analyze the deflection angle in the strong field limit of massive…Irengbam Roshila Devi, Ningthoujam Media, Yenshembam Priyobarta Singh et al.·Apr 7, 2026SaveLearn
Twisted doughnuts: Thick disk torus around equatorial asymmetric black holeThe Kerr black hole spacetime is symmetric with respect to a well-defined equatorial plane. When such a symmetry is broken, for instance, by some putative effects beyond general relativity, the…Che-Yu Chen, Eva Hackmann, Audrey Trova·Apr 7, 2026SaveLearn
Black holes in rotating, electromagnetic backgrounds and topological Kerr-Newman-NUT spacetimesWe observe that a large class of well behaved stationary and axisymmetric black hole solutions in general relativity and in the Einstein-Maxwell theory can be classified according to the properties…Marco Astorino·Apr 6, 2026SaveLearn
Canonical Uncertainty Relations for Madelung Variables in Curved Spacetime: Relating Dark Matter Cores and Unruh RadiationWe establish fundamental uncertainty relations for the hydrodynamic variables arising from the Madelung representation of quantum fields in curved spacetime. Through canonical quantization of the…Jorge Meza-Domínguez, Tonatiuh Matos·Apr 6, 2026SaveLearn
EHT-Constrained Analysis of Shadow Deformation in Quantum-Improved Rotating Non-Singular Magnetic MonopoleWe studied the shadow cast by a rotating Bardeen black hole within the framework of asymptotically safe gravity. The null geodesics were analyzed using the Hamilton Jacobi separation method to derive…Gowtham Sidharth M, Sanjit Das·Apr 6, 2026SaveLearn
Preliminary study on the impact of stress-energy tensor compared to scalar field in Nonminimal Derivative modelIn this article, we report the results of comparing the effect of using trace of stress-energy tensor versus real-valued scalar field in Nonminimal Derivative Coupling gravitation model, respectively…Ilham Prasetyo, Bobby Eka Gunara, Agus Suroso·Apr 6, 2026SaveLearn
Shadow, Sparsity of Radiation and Energy Emission Rate in Skyrmion Black HolesWe examine several observable optical properties of a Skyrmion black hole (BH), focusing on the photon sphere, BH shadow, and photon trajectories. The Skyrme term, along with other geometric…Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı·Apr 6, 2026SaveLearn
Universal Ladder Structure Across Scales: From Quantum to Black Hole PhysicsSecond-order ordinary linear differential equations appear ubiquitously across physics, describing the behavior of systems from the quantum world of atoms to the classical world of gravitating…Rajes Ghosh, Rajendra Prasad Bhatt, Sumanta Chakraborty et al.·Apr 6, 2026SaveLearn
Black Hole Entropy in f(Q) Gravity from the RVB Residue MethodWe extend the residue-based Robson-Villari-Biancalana (RVB) method from the calculation of Hawking temperature to the determination of black hole entropy within f(Q) gravity. Starting from the…Wen-Xiang Chen·Apr 6, 2026SaveLearn
Parametrized quasinormal modes, greybody factors and their correspondenceWe present a detailed study of quasinormal modes and greybody factors in the context of the parametrized quasinormal mode framework, in which modifications to general relativity are introduced as…Georgios Antoniou·Apr 6, 2026SaveLearn
Revisiting The Gravitational Mirroring In Presence of Compact ObjectsWe propose a novel concept of astrophysical mirroring in the schwarzschild framework, which emerges as a direct consequence of gravitational lensing effects occurring in the immediate vicinity of…Bikramarka S Choudhury, Aritra Sanyal, Md Khalid Hossain et al.·Apr 6, 2026SaveLearn
The formation of a weak null singularity in the interior of generic rotating black holesGiven a characteristic initial value problem with smooth data representing a dynamical event horizon settling down to that of Kerr in the subextremal, strictly rotating range with suitable upper and…Jonathan Luk, Jan Sbierski·Apr 6, 2026SaveLearn
Gravitational waves production during preheating within GB gravity with monomial couplingIn this paper, we investigate the production of gravitational waves during the preheating era. To achieve this purpose, we consider Gauss-Bonnet inflation model with Powerlaw potential,…Brahim Asfour, Yahya Ladghami, Taoufik Ouali·Apr 6, 2026SaveLearn
Subtleties in non-equilibrium horizon thermodynamics of modified gravity theoriesThermodynamic interpretations of gravity often arise from applying the Clausius relation to spacetime horizons. In modified gravity theories with higher-order equations of motion, such as f(R) and…Vishnu A Pai, Vishnu S Namboothiri, Titus K Mathew·Apr 6, 2026SaveLearn
Optical Appearance and Ringdown of Black Holes in a Kalb Ramond Field Coupled to Perfect Fluid Dark MatterThis paper investigates the optical and dynamical properties of a static spherically symmetric black hole in the presence of a Kalb--Ramond (KR) field coupled to perfect fluid dark matter (PFDM). We…Qi-Qi Liang, Zi-Qiang Cai, Dong Liu et al.·Apr 6, 2026SaveLearn
Cosmic Inflation From Regular Black HolesWe study braneworld cosmology in quasi-topological gravity (QTG) with an infinite tower of higher-curvature terms, focusing on the case in which the bulk admits regular black hole solutions. We…Kensuke Sueto, Riku Yoshimoto, Pablo A. Cano·Apr 6, 2026SaveLearn
Galileon versus Quintessence: A comparative phase space analysis and late-time cosmic relevanceWe perform a comparative phase space analysis of the light mass Galileon model and standard Quintessence in the context of late--time cosmic acceleration. Focusing on a spatially flat FLRW…Mohd Shahalam·Apr 6, 2026SaveLearn