Polarization images of non-topological soliton Bardeen boson starsIn this study, we investigate the polarized images of non-topological soliton Bardeen boson stars by solving the coupled Einstein nonlinear electrodynamics complex scalar field equations, based on…Xiao-Xiong Zeng, Chen-Yu Yang, Ke-Jian He et al.·Jul 7, 2026SaveLearn
Starobinsky Inflation in k-Essence Framework: Attractor Dynamics, Reheating, and Consistency with ACT DR6The recent ACT DR6 has shifted the preferred value of the scalar spectral index upward so that many well-established inflationary models have been disfavoured, including the Starobinsky potential.…Abolhassan Mohammadi, Yogesh, Hongwei Tan et al.·Jul 7, 2026SaveLearn
Noise-induced stabilization of Schwarzschild--AdS black holes under stochastic Ricci flowWe investigate the stochastic Ricci flow of spherically symmetric perturbations of the Schwarzschild--Anti de Sitter black-hole metric. Elaborating on the Ricci-flow analysis of Headrick and Wiseman,…Jihui Wang, Matteo Lulli, Antonino Marciano·Jul 7, 2026SaveLearn
Quasinormal modes of scalar perturbations in Rastall thick braneWe investigate quasinormal modes of the graviscalar sector in a five-dimensional thick brane model in Rastall gravity. By considering a specific flat brane solution supported by a canonical scalar…Shan Huang, Chun-Chun Zhu, Tao-Tao Sui·Jul 7, 2026SaveLearn
Solving Hamiltonian Constraint Equation with Physics-Informed Neural NetworksNumerical relativity (NR), solving Einstein equation numerically, plays an important role in source modelling for gravitational wave astronomy. Traditional methods for NR including finite difference…Yu-Chen Zhou, Hao Ma, Zhoujian Cao et al.·Jul 7, 2026SaveLearn
Probing near-zone magnetic fields with extreme mass-ratio inspiralsWe investigate whether weak near-zone magnetic fields can leave observable imprints on extreme-mass-ratio inspiral (EMRI) waveforms. The central massive black hole is modeled by the magnetized…Jin-Lu Hu, Xin-Dong Du, Peng-Cheng Li et al.·Jul 7, 2026SaveLearn
On the Uniqueness of Embeddings of Causal SetsWe introduce the notion of a well-conditioned embedding of a causal set into a Lorentzian manifold and prove that if a causal set admits well-conditioned embeddings into two manifolds, then their…Nathan Madsen·Jul 7, 2026SaveLearn
Chaos bound for spinning particles in Kerr-Newman-AdS black holesIn this paper, we employ spinning test particles as probes to investigate the regulatory effects of particle and black hole parameters on the violation of the chaos bound in Kerr-Newman-AdS…Deyou Chen, Chuang Yang, Kangqiao Liu·Jul 7, 2026SaveLearn
Finite Coherence in Gravitational Waves from Tidally Excited Axion CloudsAxion clouds around rotating black holes form gravitational atoms whose tidal transitions can radiate gravitational waves in binaries. For strongly coupled Bohr crossings, transition radiation is…Yizhi Liang, Mian Zhu, Wen-Biao Han et al.·Jul 7, 2026SaveLearn
New Rotating Black Hole in Electromagnetic Fields: Cosmological Horizon without Cosmological ConstantWe obtain a new electrovacuum and related background spacetime that contains a cosmological horizon supported entirely by the electromagnetic field. The local solution belongs to the Kundt class of…Liang Ma, H. Lu·Jul 7, 2026SaveLearn
Horizon formation from effective matter profiles in static spacetimesThe formation of event horizons is traditionally studied as the endpoint of gravitational collapse, where the matter distribution and the spacetime geometry are evolved simultaneously toward a black…Pablo León, G. Alencar, Manuel Gonzalez-Espinoza et al.·Jul 7, 2026SaveLearn
Integrability of Conformal Killing Vectors in the Eisenhart Lift of Scalar-Field FLRW CosmologyWe study the integrability conditions of the conformal Killing equations for the Eisenhart lift of a scalar field in a flat Friedmann-Lema\ıtre-Robertson-Walker universe. The determinant condition…Takeshi Chiba, Tsuyoshi Houri·Jul 7, 2026SaveLearn
No-Go Theorem for Singularity ResolutionWe prove a No-Go theorem for singularity resolution in homogeneous, spatially flat gravitational collapse: within this sector, quantum corrections introduced solely as non-vanishing effective matter…Zhen-Xiao Zhang, Chen Lan, Yan-Gang Miao·Jul 7, 2026SaveLearn
Accelerated expansion of the universe purely driven by scalar field fluctuationsWe show that scalar field fluctuations alone can drive cosmic acceleration, provided the universe is spatially closed and the Compton wavelength of the field exceeds the radius of curvature. This…Daniel Jiménez-Aguilar·Jul 7, 2026SaveLearn
Waveform stability of black hole ringdown with stochastic horizon structureWe examine the robustness of black hole ringdown to stochastic horizon-scale structure within an effective field framework in a proof-of-principle Schwarzschild setup.Consistent with the…Han-Wen Hu, Cheng-Jun Fang, Zong-Kuan Guo·Jul 7, 2026SaveLearn
How Lorentz boosts reshape relaxation spectraIn relativity, relaxation processes are often assumed to undergo time dilation under Lorentz boosts. We show that this intuition fails generically. Due to relativity of simultaneity, Lorentz boosts…Lorenzo Gavassino·Jul 7, 2026SaveLearn
Electric Penrose process in the spacetime of a quantum-corrected Reissner-Nordström black holeIn this paper, we study the electric Penrose process for charged particles in the spacetime of a covariant quantum-corrected Reissner-Nordström black hole. We first derive the equations of motion for…Jiawei Chen, Jinsong Yang·Jul 7, 2026SaveLearn
BinaryGFH-v2: Improved method to search for gravitational waves from sub-solar-mass, ultra-compact binaries using the Generalized Frequency-Hough TransformObserving gravitational waves from sub-solar-mass, inspiraling compact binaries would provide almost smoking-gun evidence for primordial black holes. Here, we develop a method to search for…Andrew L. Miller, Lorenzo Pierini·Jul 7, 2026SaveLearn
Searching for binary black hole mergers with deep learning in Advanced LIGO's third observing runThe detection of gravitational waves from compact binary coalescences has provided significant insights into our Universe, and the discovery of new and unique gravitational wave candidates from…Damon Beveridge, Alistair McLeod, Linqing Wen et al.·Jul 7, 2026SaveLearn
Future Stability of Tilted Two-Fluid Bianchi I SpacetimesWe establish the nonlinear stability to the future of tilted two-fluid Bianchi I solutions to the Einstein-Euler equations with positive cosmological constant and linear equations of state…Grigorios Fournodavlos, Elliot Marshall, Todd A. Oliynyk·Jul 7, 2026SaveLearn
Neutrino dynamics in a non-commutative spacetimeWe investigate neutrino dynamics in a spherically symmetric non-commutative black hole spacetime generated by a Lorentzian smeared matter distribution. We work with the leading-order…A. A. Araújo Filho, N. Heidari, Yuxuan Shi·Jul 7, 2026SaveLearn
Black Hole Solutions with Electric and Magnetic Charges in Nonlinear ElectrodynamicThis review article provides a comprehensive and self-contained overview of black hole solutions coupled to nonlinear electrodynamics (NLED) with both electric and magnetic charges. We systematically…Shu Luo·Jul 7, 2026SaveLearn
Gravitational Waves in Chern-Simons-Gauss-Bonnet GravityIt is known that the four-dimensional effective field theory arising from heterotic string theory is general relativity with both a Chern-Simons and Gauss-Bonnet term. We study the propagation of…Tatsuya Daniel, Leah Jenks, Stephon Alexander·Jul 7, 2026SaveLearn
Beyond ΛCDM with the SKA Observatory -- I: Probing Gravity on Cosmological ScalesGeneral relativity (GR) is currently the best description of the gravitational interaction at our disposal and is one of the foundations of the concordance cosmological model. For as much as we know…S. Camera, C. Addis, S. L. Guedezounme et al.·Jul 6, 2026SaveLearn
Ruppeiner thermodynamic geometry, microstructure, quasinormal modes and greybody factors of the Einstein-Skyrme black holeWe investigate the thermodynamic microstructure, quasinormal mode spectrum, and greybody factors of the exact, static, spherically symmetric black hole in Einstein-Skyrme theory, building on the…Shakhboz Khasanov, Akmal Safarov, Bo Yang et al.·Jul 6, 2026SaveLearn