Generalized Einstein-ModMax-ScalarField theories and new exact solutionsWe present a generalized Ernst-type framework for stationary, axisymmetric spacetimes in which a scalar field is coupled to the electrodynamic field, with a particular focus on the ModMax theory. Our…Leonel Bixano, Tonatiuh Matos·Mar 27, 2026SaveLearn
Testing the strong equivalence principle with multimessenger binary neutron star mergersThe constancy of the gravitational constant G is a cornerstone of the strong equivalence principle and of general relativity, yet its possible temporal variation remains a key target in tests of…Jie Zhu, Hanlin Song, Zhenwei Lyu et al.·Mar 26, 2026SaveLearn
Particle motions and gravitational waveforms in rotating black hole spacetimes of loop quantum gravityWe study the influence of the loop quantum gravity (LQG) holonomy-correction parameter ξ on black hole horizon structure, timelike geodesic motion, and gravitational wave emission in two rotating…Yang Yang, Yu-Xuan Bai, Yong-Zhuang Li et al.·Mar 26, 2026SaveLearn
Topological Quantization of Complex Velocity in Stochastic SpacetimesWe establish a rigorous geometric framework for quantum fields on a stochastic gravitational background. Starting from a master partition function that averages over metric fluctuations, we define a…Jorge Meza-Domínguez, Tonatiuh Matos·Mar 26, 2026SaveLearn
Detectability and Systematic Bias from First-Order Phase-Transition Dephasing in Kerr EMRIsWe study gravitational-wave dephasing induced by an effective first-order phase transition in a Kerr extreme mass-ratio inspiral (EMRI). The transition is modeled phenomenologically as a finite-width…Jingxu Wu, Liangyu Luo, Junyi Zhang et al.·Mar 26, 2026SaveLearn
Exact lambdavacuum solutions in higher dimensionsIn this work, we obtain exact solutions to the (n+2)-dimensional Einstein Field Equations with a non-zero cosmological constant for n > 1. These solutions depend on a set $\ Aa, a=1,2,… ,…I. A. Sarmiento-Alvarado, P. Wiederhold, T. Matos·Mar 26, 2026SaveLearn
Repetitive Penrose Process in Kerr-Taub-NUT black hole spacetimeIn this article, we study the repetitive Penrose process for the Kerr-Taub-NUT black hole (BH). First of all, we briefly review the spacetime of the Kerr-Taub-NUT BH, including horizon and ergosphere…Mirzabek Alloqulov, Bobomurat Ahmedov, Chengxun Yuan·Mar 26, 2026SaveLearn
An effective cosmological constant as black hole primary hairWe study Generalized Proca theories inspired by the recent regularised Proca theory of four-dimensional Gauss-Bonnet gravity. By abandoning the rigid constraints typically imposed by specific…Christos Charmousis, Pedro G. S. Fernandes, Mokhtar Hassaine·Mar 26, 2026SaveLearn
Implementing Bell causality in Quantum Sequential GrowthWe explore different implementations of the quantum Bell causality (QBC) condition in the quantum sequential growth (QSG) dynamics of causal set quantum gravity, for non-commuting transition…Ritesh Srivastava, Sumati Surya·Mar 26, 2026SaveLearn
Quasinormal modes and AdS/CFT correspondence of a rotating BTZ-like black hole in the Einstein-bumblebee gravityWe obtain exact expressions for the quasinormal modes (QNMs) of the massive scalar, fermionic and vector perturbations around a rotating BTZ-like black hole in the Einstein-bumblebee gravity. We find…Fangli Quan, Zhong-Wu Xia, Rui Ding et al.·Mar 26, 2026SaveLearn
Black holes as portals to an Euclidean realmMotivated by a one-cycle cosmological scenario where the big bang marks the egress from a Euclidean metric signature regime, we investigate the possibility of black holes (BH) hosting the mirroring…Fan Zhang·Mar 26, 2026SaveLearn
Non parametric constraints of gravitational-electromagnetic luminosity distance ratioThe ratio between the gravitational waves (GW) and electromagnetic waves (EMW) luminosity distance ratio is a key observable that allows to test the nature of gravity, using gravitational waves…Sergio Andrés Vallejo-Peña, Antonio Enea Romano, Jonathan Gair·Mar 26, 2026SaveLearn
Magnetic Modification of Black Hole Photospheres with Image Contraction, Efficiency Shifts and Redshift Boosts in Schwarzschild-Bertotti-Robinson SpacetimeWe investigate the optical and radiative signatures of an accretion disk around a Schwarzschild black hole (BH) immersed in a uniform magnetic field. The spacetime geometry is described by the…Javokhir Sharipov, Pankaj Sheoran, Sanjar Shaymatov·Mar 26, 2026SaveLearn
Sign Errors in "The Four Laws of Black Hole Mechanics"In 1973, Bardeen, Cater, and Hawking published "The Four Laws of Black Hole Mechanics", establishing the mathematical framework that would later be understood as the thermodynamics of black…Richard P. Behiel·Mar 26, 2026SaveLearn
Constraining fractionality using some observational testsRecently, a fractional version of the Schwarzschild-Tangherlini black hole with a fractal horizon has been introduced. Motivated by the key role of the Schwarzschild solution in gravitational and…H. Moradpour, S. Jalalzadeh, R. Jalalzadeh et al.·Mar 26, 2026SaveLearn
Curvature Corrections to the Yukawa Potential in Tolman MetricsThis work investigates curvature-induced modifications to the Yukawa potential in static, spherically symmetric spacetimes described by Tolman metrics, focusing on their implications for compact…J. V. Zamperlini, C. C. Barros·Mar 26, 2026SaveLearn
Quantum gravitational effects suppress the formation of trapped surfacesClassical general relativity predicts that a contracting, spherically symmetric matter system with a large-enough mass will result in the formation of a trapped region whose outer boundary is an…Ram Brustein, A. J. M. Medved, Hagar Meir·Mar 25, 2026SaveLearn
Direct cosmographic reconstruction of the quintessence potentialWe derive expressions for the first and second derivatives of the quintessence potential V(ϕ), in terms of λ= -V/V and Γ= (V /V)/(V/V)2, as functions of the…Saikat Chakraborty, Peter K. S. Dunsby, Robert J. Scherrer·Mar 25, 2026SaveLearn
Consistent Gauge Conditions for Dust-Shell Dynamics in Effective Quantum GravityPrevious analyses of shocks generated by shell-crossing singularities are affected by inappropriate gauge choices, and no systematic method is available for selecting a consistent gauge. To address…Dongxue Qu, Cong Zhang·Mar 25, 2026SaveLearn
Bouncing Cosmological Models and Energy Conditions in f(Q, Lm) gravityThis study explores the bouncing solutions within the framework of modified f(Q, Lm) gravity. We examine four prominent bouncing models, the symmetric bounce, super bounce, oscillatory bounce, and…S. A. Kadam, V. A. Kshirsagar, Santosh Kumar Yadav·Mar 25, 2026SaveLearn
Primordial black hole formation from transient f(T) cosmologyWe study primordial black hole (PBH) formation in a minimally coupled f(T) teleparallel cosmology that generates a transient departure from standard radiation domination. The model is constructed…Gerasimos Kouniatalis, Theodoros Papanikolaou, Spyros Basilakos et al.·Mar 25, 2026SaveLearn
Topological signatures in Kerr-Sen AdS black hole thermodynamicsBlack hole thermodynamics and topology have emerged as a strong foundation for a coordinate-independent understanding of phase transitions. Using both Duan's topological current theory and a…Mohd Rehan, Md Sabir Ali, Sushant G. Ghosh·Mar 25, 2026SaveLearn
Unitary time-reversal on non-orientable spacetimesTime reversal symmetry occupies a distinctive role in quantum mechanics, fundamentally requiring an anti-unitary operator to ensure a physically consistent representation. As such, the time reversal…Ovidiu Racorean·Mar 25, 2026SaveLearn
Quasinormal Modes of a Massive Scalar Field in 4D Einstein--Gauss--Bonnet Black Hole SpacetimesWe analyze quasinormal modes, grey-body factors, and absorption cross-sections of a massive scalar field in four-dimensional Einstein--Gauss--Bonnet black-hole spacetimes within a…Bekir Can Lütfüoğlu·Mar 25, 2026SaveLearn
Non-minimal Effective Scalar-Tensor Gravity in the Early UniverseWe study the consistency of several early-Universe scenarios within a framework of non-minimal effective sca\-lar--ten\-sor gravity. We show that bounce, inflation, and genesis stages are supported…Oleg Zenin, Roman Stamov, Sergey Kuzmin et al.·Mar 25, 2026SaveLearn