Parity-violating spatially covariant gravity at total derivative order d=5We extend the polynomial construction of parity-violating spatially covariant gravity (SCG) to total derivative order d=5, where d=dt+ds counts the total number of…Jin-Jian Song, Xian Gao·Jul 22, 2026SaveLearn
Cosmological horizon thermodynamics in Gauss-Bonnet quasi-dilaton Massive GravityWe investigate the thermodynamic properties of the cosmological apparent horizon in Gauss-Bonnet quasi-dilaton massive gravity. We derive the modified Friedmann equations and reformulate them in…Sobhan Kazempour, Orlando Luongo, Sabahat et al.·Jul 22, 2026SaveLearn
Intermittency in Quantum Graviton-Phonon ConversionA graviton can be converted into a phonon in a resonant bar detector. First-order perturbation theory predicts a strong enhancement of this conversion for coherent and squeezed graviton states, but…Yuna Gouin, Sugumi Kanno, Jiro Soda·Jul 22, 2026SaveLearn
What may come beyond the Wheeler-DeWitt approach?The goal of this paper is to compare the Wheeler-DeWitt approach, understood in a broad sense, with an alternative one, the so-called extended phase space approach to quantization of gravity. By…T. P. Shestakova·Jul 22, 2026SaveLearn
Geometry-Induced Termination of the Repetitive Penrose Process in Rotating Simpson-Visser Black HolesWe examine the Repetitive Penrose Process in the rotating Simpson-Visser spacetime, whose parameter space includes regular black holes, black-bounce geometries, and traversable wormholes. Assuming…Mohammad Ali S. Afshar, Mohammad Reza Alipour, Saeed Noori Gashti et al.·Jul 22, 2026SaveLearn
Quasinormal modes of scalar and Maxwell field perturbations coupled to the Einstein tensor in generalized Nariai spacetimesWe investigate the quasinormal modes of scalar and Maxwell field perturbations coupled to the Einstein tensor in generalized Nariai spacetimes. Our results show that, for both types of perturbations,…Xin Qin, Xiongying Qiao, Qiyuan Pan et al.·Jul 22, 2026SaveLearn
Quasinormal modes of the Kazakov--Solodukhin quantum-corrected black hole: a spectral analysisWe compute quasinormal modes of the Kazakov--Solodukhin quantum-corrected black hole using a high-precision Chebyshev spectral method. After factoring out the quasinormal mode asymptotics at the…Davide Batic, Denys Dutykh, Mark Sukaiti·Jul 22, 2026SaveLearn
Coordinate Independence of the Schwarzschild Black Hole Accretion Vlasov Gas ModelThis paper presents a detailed study of the coordinate dependence of Vlasov gas accretion onto a Schwarzschild black hole. Asymptotic results at infinity and near horizon are obtained via Taylor…Ping Li, Jun Cheng, Jiang-he Yang·Jul 22, 2026SaveLearn
Characterization of the Scattered Light Noise in KAGRA InterferometerIn a gravitational wave (GW) telescope, non-stationary noise can prevent stable interferometer operation and limit the GW analyses. Among the non-stationary noise, we focus on the scattered light…Shih-Hong Hsu, Hirotaka Yuzurihara, Chia-Jui Chou et al.·Jul 22, 2026SaveLearn
Circular-orbit dynamics and QPO constraints in static Einstein--scalar--Gauss--Bonnet black holesEinstein--scalar--Gauss--Bonnet (EsGB) gravity provides a physically motivated framework for testing strong-field deviations from the Schwarzschild geometry through scalar hair. We study…Sardor Murodov, Bekzod Rahmatov, Otabek Umarov et al.·Jul 22, 2026SaveLearn
Analytical Criteria for Black Hole Instability in Non-Minimally Coupled Scalar-Tensor TheoriesIn this paper, we show that the robustness of black hole stability is not preserved when perturbations are subjected to critical values of the coupling constant in two non-minimally coupled…Majid Karimabadi, Davood Mahdavian Yekta, S. A. Alavi·Jul 22, 2026SaveLearn
On the geometrical and dynamical distinction between Unimodular and General Relativistic wormholesWe characterize traversable wormholes in Unimodular Gravity (UG) and investigate what distinguishes them from their General Relativistic (GR) counterparts. For a class of static and spherically…Marco Bosquez, Erick Pastén, Mauricio Cataldo et al.·Jul 22, 2026SaveLearn
Angular momentum flux through post-Newtonian order for noncircular nonspinning black-hole binaries in Einstein-Maxwell-dilaton theoryWe compute the instantaneous angular momentum flux from nonspinning black hole binaries in Einstein-Maxwell-dilaton theory for generic noncircular orbits up to relative first post-Newtonian order.…Qi Tan, Peng-Cheng Li·Jul 22, 2026SaveLearn
A winding number analysis of Schwarzschild black hole stability in light of Planck-scale modified kinematicsDetermining whether Planck-scale effects can stabilize black holes addresses fundamental questions about black hole evaporation and quantum gravity consistency. Here, we analyze the thermodynamic…Mohsen Khodadi, Nosratolla Jafari, Shahin Mamedov·Jul 22, 2026SaveLearn
Combining gravitational wave search pipelines to find subthreshold signals in GWTC-5.0The detection of transient gravitational wave signals relies on independent search algorithms that analyse detector data and assign significance measures to candidate events. However, varying…Ann-Kristin Malz, Samuel Russell, Gregory Ashton et al.·Jul 22, 2026SaveLearn
Towards a causal effective thermodynamics of scalar-tensor gravityThe thermal analogy between the effective fluid of scalar-tensor gravity and Eckart's irreversible thermodynamics is extended to the causal Israel-Stewart model, adopting the minimal ansatz of…Narayan Banerjee, Andrea Giusti, Valerio Faraoni et al.·Jul 22, 2026SaveLearn
Neutron stars more compact than black holes in quasi-topological gravity: Equilibrium configurations and radial stabilityWithin general relativity, black holes are widely regarded as the ultimate benchmark for compactness in the Universe. Recently, however, neutron star models have been constructed in a…Liang Liang, Zhe Luo, Shoulong Li et al.·Jul 22, 2026SaveLearn
Black holes and neutron stars in massive Hellings-Nordtvedt theoryHellings-Nordtvedt theory is a vector-tensor theory in which a vector field Aμ is nonminimally coupled to curvature through two independent interactions A2 R and AμAν Rμν.…Zhe Luo, Liang Liang, Zhong-Xi Yu et al.·Jul 22, 2026SaveLearn
A No-Go Theorem for Quantum Cosmologies with Non-natural HamiltoniansThe Eisenhart-Duval lift (ED) geometrizes classical dynamics by embedding their trajectories into null geodesics of a higher-dimensional Lorentzian spacetime. However, such a construction requires a…Christine C. Dantas·Jul 22, 2026SaveLearn
Oscillon Formation in Palatini Modified Gravity TheoriesWe investigate the formation of spatially localized, oscillatory in time and non topological solitonic, quasi-stable energy configurations, Oscillons, which are formed at the end of Inflationary…Shreyas Upadhye, Sukanta Panda·Jul 22, 2026SaveLearn
Dissipative Unimodular Gravity: Linking Energy Diffusion to Bulk Viscosity as an Alternative to ΛCDM under DESI DR2 DataIn this paper, we perform a theoretical and observational study of the presence of viscosity in the Unimodular Gravity formalism, a pioneering approach that, to the best of our knowledge, has not…Norman Cruz, Esteban González, Guillermo Palma·Jul 22, 2026SaveLearn
Twinkle twinkle dark star: Oscillating profiles from dark matter scalar solitonsReal scalar fields, e.g. the axion, cannot condensate into stationary solitonic configurations to form starlike structures, eventually either dispersing or collapsing. However, by relaxing the…Nicolas Aimar, Caio F. B. Macedo, João Luís Rosa et al.·Jul 22, 2026SaveLearn
Polarized image of an equatorial emitting ring around a Konoplya-Zhidenko rotating non-Kerr black holeWe investigate the polarized images of an equatorial emitting ring around a Konoplya-Zhidenko rotating non-Kerr black hole, which introduces an additional deformation parameter. The deformation…Xin Qin, Fen Long, Songbai Chen et al.·Jul 22, 2026SaveLearn
Deviations from Gaussian White Noise in Stochastic InflationStochastic inflation is widely used as a framework to study scalar field perturbations on an inflationary spacetime in a classical manner. In Starobinsky's seminal work and most of the subsequent…Zahra Ahmadi, Mahdiyar Noorbala·Jul 22, 2026SaveLearn
Discovering gravitational waveform distortions from lensing: A deep dive into GW231123Gravitational waves (GWs) are unique messengers as they travel through the Universe without alteration except for gravitational lensing. Their long wavelengths make them susceptible to diffraction by…Juno C. L. Chan, Jose María Ezquiaga, Rico K. L. Lo et al.·Jul 22, 2026SaveLearn