Decoupled asymmetric thin-shell wormholesWe construct reflection-asymmetric thin-shell wormholes by joining a Schwarzschild exterior to its minimal geometric deformation, which shares the same mass and redshift function, so that the…A. López-Hormazábal, Hishan Farfán-Bachiloglu, Kazuharu Bamba et al.·Oct 26, 2026SaveLearn
Phase-Space Constraints on a General Class of Eckart-like Viscous CosmologiesWe study the cosmological dynamics of a general class of viscous dark matter models using a dynamical system analysis. In the Eckart formalism, these viscous cosmologies are characterized by a…David R. Moreno, J. Bayron Orjuela-Quintana, Yeinzon Rodriguez·Oct 26, 2026SaveLearn
Gravitational-Wave Signatures and Periodic Orbits of Charged Particles Around a Five-Dimensional Rotating Black Hole: Comparison with the Kerr Black HoleWe study periodic orbits of charged particles in the equatorial plane of a five-dimensional (D=5) rotating Myers--Perry black hole (BH) immersed in a uniform magnetic field, and the gravitational…Bahromjon Shokirov, Tursunali Xamidov, Chen Zhou et al.·Oct 26, 2026SaveLearn
From Specific Heat Bounds to Penrose-like Inequalities: A Unified Thermodynamic PerspectiveUnder explicit and physically motivated assumptions, we identify a local-to-global thermodynamic mechanism that organizes several previously disconnected inequalities on black holes. We first focus…Kai-Peng Lu, H. Lu, Run-Qiu Yang·Oct 26, 2026SaveLearn
Bargmann-invariant witness of the graviton commutatorWe identify the phase of a Bargmann invariant of two matter-wave interferometers as a quantum gravity signature that cannot be reproduced by any branchwise-definite classical gravitational field. For…Hiroki Matsui·Oct 26, 2026SaveLearn
An asymptotically conical regular black hole in four-dimensional nonpolynomial quasitopological gravityIn this work, we construct an asymptotically conical regular black hole in four-dimensional nonpolynomial quasitopological gravity. Starting from a linear choice of the reduced function, which yields…Jia-Zhou Liu, Shao-Wen Wei, Yu-Xiao Liu·Oct 26, 2026SaveLearn
Quasinormal modes of thick branes in f(R,T) gravityWe study tensor perturbations and quasinormal modes (QNMs) of thick branes in f(R,T)=R+αT gravity. Starting from the background thick brane solutions, we derive the Schrödinger-like equation for…Yu-Peng E, Hai-Long Jia, Chun-Chun Zhu·Oct 26, 2026SaveLearn
The C0-inextendibility of Kerr spacetimesWe prove the C0-inextendibility of the full Kerr realizations considered in this paper and all their connected covering spacetimes. The result holds for positive mass and nonzero rotation in the…Bobby Eka Gunara·Oct 26, 2026SaveLearn
Exact spinning wormholes in five dimensions from Toda integrabilityWe construct a new exact solution to the five-dimensional Einstein-phantom-scalar system that describes a rotating wormhole connecting two asymptotically flat regions. The solution represents a…Masato Nozawa·Oct 26, 2026SaveLearn
Can a Wormhole Induce a Monopole?Could a star orbiting one mouth of a wormhole make the mass seen near the other rise and fall? We show that the periodic mass change proposed for searches around Sgr A* does not occur. The predicted…Sergei Slobodov·Oct 25, 2026SaveLearn
Existence of static axisymmetric solutions to the Einstein equationsWe construct smooth Riemannian metrics and scalar potentials that are invariant under a circle action and satisfy the static Einstein equations with positive cosmological constant. The underlying…Philippe G. LeFloch, Luc Rozoy·Oct 25, 2026SaveLearn
Geometric criticality and regular quasibound spectra of axial Proca fields in Schwarzschild spacetimeWe investigate how a local geometric critical point of the odd-parity Proca potential relates to the global quasibound spectrum in Schwarzschild spacetime. After normalization by μ2, the axial…Antonio Sousa Ribeiro, Francisco Artur Pinheiro Alves Junior·Oct 25, 2026SaveLearn
Relativistic diffusing particles, entropy and varying cosmological constantsWe discuss Einstein equations with a non-conserved energy-momentum Tμν. The energy-momentum tensor Tμν on the right hand side of Einstein equations is expressed in the form…Z. Haba·Oct 25, 2026SaveLearn
Topological analysis of novel charged-AdS black hole solutions embedded in dark matter halos with quintessence fieldIn this work, we investigate the properties of a charged anti-de Sitter (AdS) black hole in the presence of a NGC 4649-type dark matter halo and a surrounding quintessence field. Starting from the…Muhammad Yasir, Hafiza Bushra Mujahid, Faisal Javed et al.·Oct 25, 2026SaveLearn
Finite-Distance Imaging of Relativistic Equilibrium Tori around Genuine Kerr--Bertotti--Robinson Black HolesWe calculate finite-distance images of stationary, pressure-supported tori around genuine, electrically neutral Kerr--Bertotti--Robinson black holes using general relativistic ray tracing with gray…Hao-Peng Yan, Xiang-Qian Li, Xiao-Jun Yue·Oct 25, 2026SaveLearn
Repetitive Magnetic Penrose ProcessThe nonlinear iterative repetitive Penrose process established recently by Ruffini et al.\ is generalized to the magnetic Penrose process. The spacetime background is the Kerr metric, the external…Ke Wang, Xin-Yun Hu, Xiao-Xiong Zeng·Oct 25, 2026SaveLearn
Comment on "Effect of perfect fluid dark matter..." [Phys. Dark Univ. 34 (2021) 100891]This Comment clarifies the physical interpretation of the black hole spacetime metric employed by Shaymatov et al. [Phys. Dark Univ. 34 (2021) 100891]. We point out that the metric,…Ming-Hsun Li, Kwei-Chou Yang·Oct 25, 2026SaveLearn
Validity Domains for Semiclassical Time in Quantum CosmologyWe investigate the domain in which a semiclassical gravitational WKB flow can serve as a quantitatively controlled temporal reference for subordinate quantum degrees of freedom. Rather than…Gianpaolo Rosati, Sergio L. Cacciatori·Oct 24, 2026SaveLearn
Gravitational Radiation Coupled to a real massive scalar FieldWe study the asymptotic behavior of small-data global solutions to the Einstein--Klein--Gordon system with a positive-mass real scalar field in wave gauge. We show that the linearized trace component…Yue Ma, Xianghao Wu, Weidong Zhang·Oct 24, 2026SaveLearn
Massive Scalar Quasinormal Modes and Quasibound States of Charged Black Holes with Logarithmic correctionsWe study how long-range deformations in a black-hole metric affect the oscillation, trapping, and decay of a neutral, minimally coupled massive scalar field. We choose a logarithmic deformation of…Prosenjit Paul, Rickmoy Samanta·Oct 24, 2026SaveLearn
Forecasting Strongly Lensed Binary Black Hole Rates from the Stochastic Gravitational-Wave Background with TianQinThe millihertz stochastic gravitational-wave background (SGWB) provides a population-level probe of stellar-mass binary black holes (BBHs) and their cosmic merger history. We develop a framework…Zheng-Cheng Liang·Oct 24, 2026SaveLearn
A no-go theorem for closed timelike curves in globally null-foliated spacetimesThe study of closed timelike curves has proceeded one spacetime at a time, and the criteria available form three families, the time function criteria, the energy condition criteria, and the…Hongsheng Zhang·Oct 24, 2026SaveLearn
Gravitational Waves from Ringing Dyonic Black Holes and Estimation of Parameters in Einstein-Bumblebee-Maxwell GravityIn this work, we investigate the quasinormal mode (QNM) frequencies of dyonic Reissner-Nordström (RN)-like black holes associated with scalar and gravitational perturbations in the framework of…Sikha Gogoi, Umananda Dev Goswami·Oct 24, 2026SaveLearn
Acoustic Schwarzschild-like black hole and analogous Hawking radiation in Einstein-bumblebee gravityWe derive an acoustic Schwarzschild-like black hole and study its analogous Hawking radiation in Einstein-bumblebee theory by using Gross-Pitaevskii theory in the background of Schwarzschild-like…Chikun Ding, Yuebing Zhou, Yu Shi et al.·Oct 24, 2026SaveLearn
Accurate pulsar timing array likelihoods: better low-rank covariance for gravitational wave backgroundIn pulsar timing array analyses, the stochastic process describing the gravitational wave background is typically modeled using a Fourier basis at discrete frequencies with an interval $…Heling Deng, Ken D. Olum, Rutger van Haasteren·Oct 24, 2026SaveLearn