Late-Time Cosmological Tests of a Minisuperspace Generalized-Uncertainty-Principle DeformationThe investigation of possible quantum-gravity effects in cosmology is of considerable interest, especially when such effects can be tested against observations of the late-time expansion. In the…G. G. L. Nashed·Jul 31, 2026SaveLearn
Gravito-Electromagnetic perturbation of higher derivative corrected Kerr-Newman black holeWe study linear gravito-electromagnetic perturbations of a slowly rotating 4-derivative corrected Kerr-Newman (KN) black hole (BH), using a perturbative approach beyond the KN geometry up to first…Yuanyuan Ji, Zheng-Wen Long·Jul 31, 2026SaveLearn
Obstructions to Minimal Regular Black Hole CosmologiesWe derive an obstruction to Friedmann--Lemaître--Robertson--Walker (FLRW) daughter cosmologies from static, asymptotically flat regular black holes. The trapped region of such a parent is…Damien A. Easson·Jul 31, 2026SaveLearn
Fast gravitational waveform models for quasi-circular coalescences of neutron star--black hole binariesWe present IMRPhenomXHMNSBH and SEOBNRv5HMROMNRTidalv3NSBH, the first two frequency-domain models for gravitational-wave signals from quasi-circular, aligned-spin neutron star--black hole (NSBH)…Felip A. Ramis Vidal, Adrian Abac, Marta Colleoni et al.·Jul 31, 2026SaveLearn
Red/Blue shifts of photons in a Hayward black hole immersed in perfect fluid dark matterWe investigate the red/blue shifts of photons emitted by particles moving along stable circular orbits around a Hayward black hole immersed in perfect fluid dark matter (PFDM). The PFDM contribution…L. Marlene. López, L. A. López·Jul 31, 2026SaveLearn
Observational signatures of negative mass wormholes through their shadowsSystems containing objects with negative mass (NMOs) are considered. Such a system consists of one object with positive mass and one NMO, where a bound state exists even though the force exerted by…Shin'ichi Nojiri, Sergei D. Odintsov, Diego Sáez-Chillón Gómez·Jul 31, 2026SaveLearn
Testing General Relativity with Individual Supermassive Black Hole BinariesWe develop a unified framework for testing gravity beyond General Relativity (GR) with continuous gravitational waves (CWs) from individual supermassive black hole binaries (SMBHBs). These…Qinyuan Zheng, Bjorn Larsen, Ellis Eisenberg et al.·Jul 31, 2026SaveLearn
Unifying topological, geometric, and complex classifications of black hole thermodynamicsBlack hole thermodynamics has recently witnessed three distinct classification schemes: based on local geometric properties of the temperature function, global topological invariants, and Riemann…Shi-Hao Zhang, Shao-Wen Wei, Jing-Fei Zhang et al.·Jul 31, 2026SaveLearn
Complex Inflaton Potentials with Nonminimal Coupling: Robust Inflation and Geometric ReheatingWe investigate an inflationary scenario driven by a complex scalar field nonminimally coupled to gravity and subject to a non-symmetric complex potential. The real part of the potential controls the…S. D. Campos·Jul 31, 2026SaveLearn
Conditions for Gravitational-Wave Echo Suppression in Diffeomorphism-Invariant Nonlocal Quantum GravityGravitational-wave echoes can arise when perturbations are trapped between distinct scattering structures in the effective potential of an ultracompact merger remnant. We examine the conditions under…J. W. Moffat·Jul 31, 2026SaveLearn
On the logarithmic Love number of black holes beyond general relativityTidal Love numbers and other response coefficients of black holes sometimes exhibit a logarithmic dependence on scale, or 'running'. We clarify that this coefficient is directly calculable…Sebastian Garcia-Saenz, Hongbo Lin·Jul 31, 2026SaveLearn
Gaussian curvature and Lyapunov exponent as probes of black hole phase transitionsFirst-order phase transitions of black holes have been extensively studied within thermodynamic frameworks, yet the corresponding evolution of spacetime geometric properties remains unclear. This…Shi-Hao Zhang, Zi-Qiang Zhao, Zi-Yuan Li et al.·Jul 31, 2026SaveLearn
Extending the Comisso-Asenjo Energy Extraction Mechanism to Pure Lovelock GravityIn this paper, we extend the Comisso-Asenjo magnetic reconnection (MR) mechanism to rotating black holes (BHs) in pure Lovelock/Gauss-Bonnet (GB) gravity in dimension 2N+2≤ D≤ 4N+1 (where N…Chen Zhou, Ikhtiyor Eshtursunov, Sanjar Shaymatov et al.·Jul 30, 2026SaveLearn
Obstructions to Traversable Wormholes in Einstein-Dirac TheoryTraversable wormholes are among the most striking hypothetical solutions of general relativity, but every such geometry requires matter that violates the averaged null energy condition (ANEC). A…Robert J. Weinbaum·Jul 30, 2026SaveLearn
Dynamics of compact binary systems in massive scalar Gauss-Bonnet gravityInspiraling binary systems of compact objects probe gravity in strong-field regimes, thereby exploring potential higher curvature corrections to General Relativity. Parity-invariant quadratic…Iris van Gemeren, Tanja Hinderer, Stefan Vandoren·Jul 30, 2026SaveLearn
The BGV Theorem and the Null Convergence ConditionWe examine the relationship between the Null Convergence Condition (NCC) and the Borde-Guth-Vilenkin (BGV) Theorem. We first show that, for an expanding spacetime foliated orthogonally to a timelike…William H. Kinney·Jul 30, 2026SaveLearn
Post-Newtonian Roche-Lobe-Overflow Prescription for Compact Binary Mass Transfer and the Corresponding Gravitational WaveformsMass transfer in binary systems is central to many astrophysical phenomena, including the evolution of compact interacting binaries. Starting from the first post-Newtonian hydrodynamic equations in…Shuai Zhang, Jie Yang, Zi-Han Zhang et al.·Jul 30, 2026SaveLearn
Ab Initio Real-Time Gravitational-Wave Parameter EstimationWe present a specialised GPU-native nested sampling kernel targeting rapid parameter estimation for gravitational wave inference problems. Building upon a Slice-within-Gibbs (SwiG) structure for…David Yallup, Metha Prathaban, James Alvey et al.·Jul 30, 2026SaveLearn
Logarithmic corrections to black hole entropy from minimum-assumptions discretizationWe introduce here a general model, under agnostic and minimum assumptions, to uniquely find the entropy area law with a corresponding fixed logarithmic correction term. In this approach, the horizon…Pelayo V. Calzada, Ana Alonso-Serrano, Ernesto Contreras et al.·Jul 30, 2026SaveLearn
Homogeneous and Isotropic Linearized Gravity as a Caldeira--Leggett SystemWe show that the homogeneous and isotropic sector of linearized gravity coupled to arbitrary additional degrees of freedom takes the Caldeira-Leggett form, provided their action contains no metric…Pelayo V. Calzada, Pedro Bargueño·Jul 30, 2026SaveLearn
Quartic Scalar Clouds on Fixed Kerr BackgroundsWe study stationary nonlinear clouds of a complex scalar field on fixed Kerr and Schwarzschild backgrounds, with an unbounded scalar potential. On Kerr backgrounds we find finite-amplitude Q-clouds…Hendrik Mennenga·Jul 30, 2026SaveLearn
High-accuracy drivers to simulate black hole binaries beyond general relativity with the fixing-the-equations approachWe implement the "fixing-the-equations" approach [Phys.Rev.D 96 (2017) 8, 084043] in spectre, an NR code using a pseudo-spectral discontinuous Galerkin scheme, to produce long and accurate NR…Guillermo Lara, Harald P. Pfeiffer, Nils Deppe et al.·Jul 30, 2026SaveLearn
Towards long and accurate numerical relativity waveforms of binary black holes beyond general relativityNumerical relativity (NR) simulations of compact binaries in theories beyond general relativity (GR) will be pivotal for the continued development of future tests of gravity with gravitational waves…Guillermo Lara, Harald P. Pfeiffer, Nils Deppe et al.·Jul 30, 2026SaveLearn
Foldy--Wouthuysen Transformation of the Generalized Dirac Equation in Symmetric Teleparallel GravityWe investigate the non-relativistic limit of the generalized Dirac equation in a weak, static, and spherically symmetric background of symmetric teleparallel gravity. The underlying generalized…Sabutay Ugur, Muzaffer Adak, Ali Bagci et al.·Jul 30, 2026SaveLearn
Degenerate Limits of Scalar-Tensor GravityWe study the degenerate limits of the scalar-tensor theory of gravity in its Hamiltonian connection dynamics formulation. The degenerate limit of the spatial triad is effectuated by a local scaling…Bekir Baytaş, Xiao-Kan Guo·Jul 30, 2026SaveLearn