Thermodynamic acceptability of spherically symmetric perfect-fluid solutions in general relativityStatic spherically symmetric perfect-fluid solutions of Einstein's equations play a central role in relativistic astrophysics and stellar structure theory. While many exact solutions satisfy…Dina Demissenova, Nurzada Beissen, Kuantay Boshkayev et al.·Jul 15, 2026SaveLearn
Vacuum polarization in the Schwarzschild black hole with a global monopoleWe investigate vacuum polarization on the event horizon of a Schwarzschild black hole carrying a global monopole. For a massless scalar field Ψ in the Hartle-Hawking state and with arbitrary…Leonardo G. Barbosa, Victor H. M. Ramos, João Paulo M. Pitelli·Jul 15, 2026SaveLearn
Dynamics, Ringdown, and Accretion-Driven Multiple Quasi-Periodic Oscillations of Kerr-Bertotti-Robinson Black HolesWe study the motion of test particles around the Kerr--Bertotti--Robinson (KBR) black hole (BH) and explore how the three defining parameters, the mass M, rotation parameter a, and magnetic…G. Mustafa, Orhan Donmez, Dhruba Jyoti Gogoi et al.·Jul 15, 2026SaveLearn
Exact general solutions for cosmological scalar field evolution in a vacuum-energy dominated expansionWe derive exact general solutions (as opposed to attractor particular solutions) for the evolution of a scalar field ϕ in a universe dominated by a background fluid with equation of state parameter…Patrick Hu, Robert J. Scherrer·Jul 15, 2026SaveLearn
A framework for LISA population inferenceThe Laser Interferometer Space Antenna (LISA) is expected to have a source rich data stream containing signals from large numbers of many different types of source. This will include both…Alexandre Toubiana, Jonathan Gair·Jul 15, 2026SaveLearn
Testing general relativity with amplitudes of subdominant gravitational-wave modesWe present an improved subdominant-mode amplitude (SMA) test of general relativity (GR), which probes amplitude-level deviations in the higher-order modes of gravitational-wave (GW) signals from…Ish Gupta, Purnima Narayan, Lionel London et al.·Jul 15, 2026SaveLearn
Binary gravitational waves as probes of quantum graviton statesIt is well known that the most reliable way to reveal the quantum nature of light is through photon number statistics, since photons exhibiting sub-Poissonian statistics unambiguously demonstrate…Sugumi Kanno, Jiro Soda, Akira Taniguchi·Jul 15, 2026SaveLearn
Spin-induced Quadrupole Moment (SIQM) Test for Eccentric Compact BinariesSpin-induced deformations of individual components of a binary can be quantified using the gravitational wave signal the binary emits. Such deformations are characterised by a parameter, κ, which…Syed U. Naqvi, Chandra Kant Mishra·Jul 15, 2026SaveLearn
Numerical study on the robustness of the stability for stable black holesThis paper numerically studies if the stability of a stable black hole is robust against the small perturbation on geometry near its event horizon. In an other word, we numerically study if two…Zhan-Feng Mai, Run-Qiu Yang·Jul 15, 2026SaveLearn
A Thermodynamic Positivity Bound on Higher-Derivative 3-Form Couplings in de Sitter, and its Inflationary ConsequencesWe investigate the interplay between the thermodynamic positivity bounds and slow-roll inflation within a framework governed by a 3-form gauge field. Starting from classical considerations, we derive…Nutthaphat Lunrasri, Chakrit Pongkitivanichkul·Jul 15, 2026SaveLearn
An effective Friedmann equation for a bouncing anisotropic universeWe derive generalized effective Friedmann and Raychaudhuri equations for a bouncing polymer quantized Bianchi-I spacetime. We further prove that the relation numerically derived in the literature…Syed Moeez Hassan·Jul 14, 2026SaveLearn
Modeling non-stationary noise: applications in gravitational wave astronomyIn an ideal world, the measurement noise in gravitational wave data would be stationary and Gaussian. In reality, neither of these conditions holds. Here a general framework is introduced that can be…Neil J. Cornish·Jul 14, 2026SaveLearn
Weyl gauge symmetry at LIGO-Virgo-KAGRAWith current advances in gravitational wave (GW) detection made by the worldwide LIGO-Virgo-KAGRA (LVK) network of detectors, ever-more sensitive tests of gravity in the strong-field regime are now…D. M. Ghilencea, V. -M. Mandric·Jul 14, 2026SaveLearn
Reconstruction of f(G) Gravity from an Interacting Viscous Generalized QCD Ghost Dark Energy Model: Cosmology and Thermodynamics: Cosmology and ThermodynamicsIn this work, we investigate an interacting viscous generalized QCD ghost dark energy model in the framework of reconstructed f(G) gravity proposed in Phys.\ Lett.\ B 631, 1--6 (2005). The…Zhanar Umurzakhova, Aziza Altaibayeva, Ulbossyn Ualikhanova et al.·Jul 14, 2026SaveLearn
Antikick Relation in High-Energy Head-On Collisions of Spinning Black HolesThe collision of black holes at relativistic speeds probes gravity in its most extreme dynamical regime. While the maximum gravitational recoil from grazing high-energy collisions…Carlos O. Lousto, James Healy, Alessandro Ciarfella et al.·Jul 14, 2026SaveLearn
The entropy of dynamical black holes deviating from electrovacuum in second orderWe study the entropy of dynamical black holes in Einstein--Maxwell theory. Starting from a stationary electrovacuum background with a bifurcate Killing horizon, the apparent horizon is constructed…Wen-Tao Fu, Ming-Fei Ji, Yu-Sen Zhou et al.·Jul 14, 2026SaveLearn
Qualitative Analysis of Cosmological Models Using Dynamical System PerspectiveThis thesis investigates theoretical and observational aspects of cosmic acceleration, focusing on dark energy models and modified gravity frameworks. The goal is to analyse their viability,…Sayantan Ghosh·Jul 14, 2026SaveLearn
Evaluating KAGRA upgrade scenarios for multimessenger observations of binary neutron starsBinary neutron star mergers are key targets for multimessenger astronomy, motivating future upgrades of gravitational-wave detectors. For KAGRA, both broadband sensitivity improvements that increase…Yuta Michimura, Soichiro Morisaki, Kenta Hotokezaka et al.·Jul 14, 2026SaveLearn
Two-fluid f-mode oscillations of dark-matter-admixed neutron starsWe study quadrupolar f-mode oscillations of dark-matter-admixed neutron stars (DANSs) in full general relativity (GR). The ordinary component is described by microscopic Brueckner-Hartree-Fock…Zi-Yue Zheng, Ting-Ting Sun, Huan Chen et al.·Jul 14, 2026SaveLearn
High-Frequency Gravitational Wave Constraints from Precision SpectroscopyGravitational waves affect the propagation of electromagnetic waves in laser cavities, modulating the frequency of emitted photons. We use this effect to search for high-frequency gravitational waves…Dmitry Budker, Valerie Domcke, Joachim Kopp et al.·Jul 14, 2026SaveLearn
Role of spin-curvature and magnetic interactions on circular orbits of particles with magnetic monopole around Bardeen black holesWe investigate the dynamics of magnetically charged spinning test particles in the spacetime of the Bardeen regular black hole, sourced by nonlinear electrodynamics and featuring a magnetic monopole…Shokhzod Jumaniyozov, Javlon Rayimbaev, Yuan Chengxun et al.·Jul 14, 2026SaveLearn
Particle decay and energy conservation in the Kerr-Newman black holeIn this paper, we study the decay of a particle in Kerr--Newman spacetime. Both theoretical analysis and numerical simulations show that when a particle splits in Kerr--Newman spacetime, its mass is…Bing-Bing Chen, Guo-Ping Li, Ke Wang et al.·Jul 14, 2026SaveLearn
Dynamics of potential-free warm k-inflation with nonminimal derivative couplingIn contrast to potential-driven warm inflation models, this paper presents a new inflationary scenario driven purely by noncanonical kinetic terms. We derive the evolution equations and the…Xiao-Min Zhang, Zi-Xin Bai, Run-Qing Zhao et al.·Jul 14, 2026SaveLearn
Propagation of Dirac spherical waves in the expanding universeThe explicit formulas for the spherical solutions of the Dirac equation in the expanding universe are given. The initial value of the solution can be, in particular, a wave function of the…Karen Yagdjian·Jul 14, 2026SaveLearn
Modified Friedmann equations and non-singular cosmologies in d=4 non-polynomial quasi-topological gravitiesQuasi-topological theories of gravity are known to resolve black-hole singularities. We investigate whether the same mechanism can remove cosmological singularities. Focusing on non-polynomial…Johanna Borissova, João Magueijo·Jul 14, 2026SaveLearn