Scale dependence of the effective gravitational constant from functional renormalization groupThe general relativity may not be the final theory of gravity. One possible way to look for the gravity theory beyond general relativity is considering variable gravitational constant. Based on the…Ruiqi Liang, Zhoujian Cao, Bing Sun·Aug 8, 2026SaveLearn
Causal-diamond thermalization induces nonseparability in N-partite quantum systemsWe investigate the nonseparability of multipartite bosonic and fermionic GHZ and W states in a causal diamond spacetime using the Abe-Rajagopal (AR) q-conditional entropy. The finite lifetime…Hui-Chen Yang, Shu-Min Wu·Aug 8, 2026SaveLearn
Innermost stable circular orbit (ISCO) of arbitrary-mass compact binaries with spins at the fourth post-Newtonian orderWe compute, up to 4th post-Newtonian (4PN) order, the gauge-invariant stability criterion determining the innermost stable circular orbit (ISCO) for arbitrary-mass compact binaries with spins aligned…Luc Blanchet, David Langlois, Etienne Ligout·Aug 7, 2026SaveLearn
The Ringdown and the Tide: Fingerprints of Dark Matter Halo ProfilesAstrophysical black holes (BH) are not isolated, but embedded in matter supplied by their host galaxies. We study how the shape of a surrounding dark matter (DM) halo modifies the ringdown and tidal…Arkadip Bhowmik, Avijit Chowdhury, Sayan Chakrabarti·Aug 7, 2026SaveLearn
The G347.3-0.5 outlier from O3: a follow-up case study for continuous gravitational-wave candidatesWe report a multi-pipeline follow-up study of the continuous gravitational-wave (CW) outlier identified by the Ming et al. Einstein@Home directed search for the young supernova remnant G347.3-0.5…L. Mirasola, F. Amicucci, M. Carrio et al.·Aug 7, 2026SaveLearn
Celephais: efficient spectral initial data code for precessing compact binariesLarge numerical-relativity surveys require compact-binary initial data that are both spectrally accurate and inexpensive to construct, including for systems with unequal masses and misaligned spins.…Hao-Jui Kuan·Aug 7, 2026SaveLearn
Inflation with Nieh-Yan-like terms in metric-affine gravityWe study single-field slow-roll inflation in metric-affine gravity with a scalar field non-minimally coupled to the non-Riemannian Ricci scalar and to the divergences of the torsion and nonmetricity…Ilaria Andrei, Christian Dioguardi, Damianos Iosifidis et al.·Aug 7, 2026SaveLearn
Gravitational caloric theory: From early dark energy to a wide variety of gravitational phenomenaWe propose gravitational caloric theory (GCT) --- an extension of general relativity that features a vector field Sμ sourced by and non-minimally coupled to the fluid sector while preserving…S. X. Tian·Aug 7, 2026SaveLearn
Spotlight searches for continuous gravitational waves triggered on radiometer candidates in LIGO O4a dataWe report on a follow-up search for continuous gravitational waves (CWs) targeting sub-threshold candidates from the O4a LIGO-Virgo-KAGRA (LVK) all-sky all-frequency (ASAF) directed radiometer…Alan M. Knee, Keith Riles, Ling Sun·Aug 7, 2026SaveLearn
Oscillations of Dissipative Neutron Stars: The Impact of Hyperonic Reaction RatesTidal excitations of stellar oscillation modes during binary neutron-star inspirals offer a powerful probe of the composition of dense matter at supranuclear densities. Chemical equilibration plays a…Suprovo Ghosh, Alexander Haber, Nils Andersson et al.·Aug 7, 2026SaveLearn
Testing the spin-induced multipole moments of compact binary coalescences using the flexible theory-independent frameworkAccording to the no-hair theorem, the multipole moments of an electrically neutral black hole in general relativity are entirely determined by its mass and spin. However, this is not in general true…Elise M. Sänger, Alessandra Buonanno, Ajit Kumar Mehta et al.·Aug 7, 2026SaveLearn
Multiscale probing of a Hernquist-type environmental black hole spacetime with the Sgr A* shadow and S2 orbital dynamicsThe supermassive black hole Sgr A* at the Galactic center provides a unique opportunity to probe the distribution of environmental matter around black holes. In this work, we adopt the Hernquist-type…Lai Zhao, Meirong Tang, Zheng-Wen Long et al.·Aug 7, 2026SaveLearn
Anomaly quenching and dynamical cooling of Hawking evaporation in Horndeski gravityWe investigate the semiclassical Hawking evaporation of a two-dimensional Callan-Giddings-Harvey-Strominger (CGHS) black hole perturbed by first-order Horndeski scalar-tensor couplings. By evaluating…Amogh Srivastav, S. Shankaranarayanan·Aug 7, 2026SaveLearn
New Universal Relations for Magnetized Neutron StarsUnlike the neutron-star mass--radius relation, which depends sensitively on the internal stellar structure through the equation of state of dense nuclear matter, certain neutron-star properties obey…Byon N. Jayawiguna, Siddarth Ajith, Takuya Katagiri et al.·Aug 7, 2026SaveLearn
Quantum-cosmological corrections to inflationary spectra from Gaussian wave packetsIn the context of quantum cosmology, we study quantum entanglement in solutions of the Wheeler--DeWitt equation for a homogeneous inflaton--gravity system coupled to perturbations. The wave function…Sebastien Sonet, Alessandro Tronconi, Giovanni Venturi·Aug 7, 2026SaveLearn
Colored Black Holes in Logarithmic Nonlinear Yang--Mills TheoryWe construct static, spherically symmetric, and asymptotically flat colored black holes in four-dimensional Einstein gravity coupled to a logarithmic nonlinear Yang--Mills field with gauge group…Celio R. Muniz·Aug 7, 2026SaveLearn
Full analytic expressions of overlap reduction functions for anisotropies of the stochastic gravitational-wave background with pulsar timing arraysPulsar timing arrays (PTAs) have detected a stochastic gravitational-wave background (SGWB) in the nanohertz band, enabling tests of gravity and cosmology, as well as studies of supermassive black…Kun Zhou, Jin Li·Aug 7, 2026SaveLearn
Entropy-geometry correspondence as effective nonlocal gravityWe develop an operator formulation of the entropy-geometry correspondence for static, spherically symmetric gravity. Starting from a generalized entropy, we reconstruct an effective nonlocal form…Kimet Jusufi, Ankit Anand·Aug 7, 2026SaveLearn
Numerical Simulation of Black Hole Images from photon trajectories in Schwarzschild GeometryWith the arrival of advanced telescopes such as the Event Horizon Telescope (EHT), direct imaging of a black hole's shadow became a reality. Simulations play an important role in reproducing…Alin Galea, Victor E. Ambrus·Aug 7, 2026SaveLearn
Geodesic completeness of anisotropic cosmologies and the null energy conditionWe demonstrate that a Bianchi-I spacetime in general relativity must be geodesically past-incomplete under the assumption of the null energy condition and provided there exists a time in which the…Sebastian Garcia-Saenz, Junjie Hua, Abbas M. Sherif·Aug 7, 2026SaveLearn
Stability of a black hole under the deformation of an extended periodic potentialIt has been shown that the spectrum of black hole quasi-normal modes is extremely sensitive to localized deformations of the geometry away from the potential peak. The deformation caused by a real…Shi-Jie Ma, Run-Qiu Yang·Aug 7, 2026SaveLearn
The gravitational wave-black hole imaging correspondence for modified black holesBlack holes (BHs) can be studied via fundamentally different observational channels that probe complementary aspects of their physics. While BH imaging provides access to the quasi-static space-time…David Díaz-Guerra, Ángel Rincón, Diego Rubiera-Garcia et al.·Aug 7, 2026SaveLearn
Primary Constraints of Newer General RelativityWe study the primary constraint structure of Newer General Relativity, a gravity theory based on a torsionless teleparallel geometry. The gravitational action is built from a scalar formed by…Carmen Ferrara, Alexey Golovnev, María José Guzmán·Aug 7, 2026SaveLearn
Accelerating Cosmological Model with Scalar Field in f(R,Lm) GravityIn this work, we investigate the cosmological dynamics of f(R,Lm) gravity using two complementary scenarios: without a scalar field and with a minimally coupled generalized scalar field.…Y. Kalpana Devi, Rahul Bhagat, B. Mishra·Aug 7, 2026SaveLearn
Off-Equatorial Orbits around Magnetically Charged Black HolesWe present a complete characterization of stable, off-equatorial circular orbits around magnetically charged black holes (MBHs). For a static, spherically symmetric MBH, we derive an exact analytic…Xilai Li, Loris Del Grosso, David E. Kaplan·Aug 7, 2026SaveLearn