Quantum Cosmology in Krylov Space: Complexity and EntropyWe study the quantum dynamics in Krylov space of a spatially flat, homogeneous, and isotropic universe sourced with a massless scalar field within Wheeler-DeWitt (WDW) quantum cosmology and loop…Meysam Motaharfar, Maxwell R. Siebersma, Parampreet Singh·Jun 21, 2026SaveLearn
Suppressed Intrinsic Curvature GravityWe consider various mechanisms of modifying the effect of intrinsic curvature in gravity with respect to General Relativity. Two primary approaches for suppressing intrinsic curvature are studied.…Ido Ben-Dayan, Elena Emtsova·Jun 21, 2026SaveLearn
Removing Ostrogradsky modes in multi-field higher-order scalar-tensor theoriesWe study how the Ostrogradsky modes can be removed in multi-field higher-order scalar-tensor theories. For a general class of theories with an arbitrary number N of scalar fields and…Hamed Bouzari Nezhad·Jun 20, 2026SaveLearn
Potentially healthy time evolution in interacting p-form fieldsIt was recently discovered that many self-interacting vector fields can have healthy time evolution when field amplitudes are small, however, further dynamics becomes impossible if the norm of the…Fethi M. Ramazanoğlu, Kıvanç İ. Ünlütürk·Jun 20, 2026SaveLearn
Non-Metricity Corrections Approach to Alleviate H 0 Tension: The Logarithmic and Nonlinear f(Q) ModelsThe persistent discrepancy between early-time and late-Universe measurements of the Hubble constant commonly known as the H0 tension remains one of the most pressing open questions in modern…Rahul Bhagat, Kesava Chodavarapu, B. Mishra·Jun 20, 2026SaveLearn
Covariant virtual work and the d'Alembert-Lagrange formulation of general relativityWe develop a covariant virtual work structure and a corresponding d'Alembert-Lagrange principle for spacetime geometry. Within this framework, General Relativity arises as a particular…A. Cuevas, C. Ortiz·Jun 20, 2026SaveLearn
Horizon Singularities in the Schwarzschild Geometry of the Teleparallel Equivalent of General RelativityCertain torsion scalar invariants are known to diverge at the horizon of the Schwarzschild solution in the Teleparallel Equivalent of General Relativity (TEGR), obstructing its interpretation as a…D. F. López, A. A. Coley, R. J. van den Hoogen·Jun 20, 2026SaveLearn
Extended spherically symmetric solutions in revised Deser--Woodard nonlocal gravityIn this work, we extend the static spherically symmetric black hole solutions of revised Deser--Woodard (D-W) nonlocal gravity. Due to the linearity of the field equations, we show that the…Haida Li, Xiangdong Zhang·Jun 20, 2026SaveLearn
Determining Kerr black hole spin and inclination from a segment of the critical curve in black hole imagesWe present a method for determining the spin parameter a/M and inclination angle i of a non-extremal Kerr black hole from segments of the critical curve identified in black hole images. Although…Kenta Hioki, Umpei Miyamoto, Tomohiro Harada·Jun 20, 2026SaveLearn
Entanglement, Discord, and Residual Coherence in Scalar-Induced Gravitational WavesScalar-induced gravitational waves (SIGWs) are usually characterized by their power spectrum, although their quadratic scalar source also carries higher-order correlation information. We investigate…Waqas Ahmed·Jun 20, 2026SaveLearn
Observational Constraints on f(Q,T) Gravity in the Presence of DBI-Essence Scalar FieldWe investigate late-time cosmology in extended symmetric teleparallel gravity coupled to a Dirac-Born-Infeld (DBI) scalar field within f(Q,T) gravity, where Q is the non-metricity scalar and T…Mayur Mune, Praveen Kumar Dhankar, Goutam Manna et al.·Jun 20, 2026SaveLearn
Quantum Memory in Scalar-Induced Gravitational WavesScalar-induced gravitational waves are usually treated as a classical stochastic background sourced by phase-random curvature perturbations. We show that this description can miss residual quantum…Waqas Ahmed·Jun 20, 2026SaveLearn
Relativistic elastic shells: material support and cavity geometryWe derive the source moments that determine the leading tidal field and rotational clock shift inside a finite-thickness relativistic elastic shell. In weak gravity and slow rotation, these moments…An T. Le·Jun 20, 2026SaveLearn
The Preheating Stage on The Starobinsky Inflation after ACTRecent ACT results favor larger e-fold numbers, which tighten the reheating requirements in Starobinsky inflation. We show that efficient reheating generically requires an additional…Norma Sidik Risdianto, Romy Hanang Setya Budhi, Nehla Shobcha et al.·Jun 20, 2026SaveLearn
Black bounce solutions in a realistic dark matter halo from M60*We formulate a Simpson-Visser black bounce solution embedded in a dark matter halo. The latter is modeled using an empirical density profile calibrated from observations of the elliptical galaxy NGC…Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo et al.·Jun 19, 2026SaveLearn
Interplay of Holographic and New Agegraphic Dark Energy in Cosmology: A hybrid dark energy model from a generalized length-time cut-offThe spatial and temporal infrared cutoffs are the source of the Holographic dark energy (HDE) and New Agegraphic dark energy (NADE) models, respectively. Inspired by the spacetime unification of…Sayani Maity, Aritra Sanyal, Prabir Rudra·Jun 19, 2026SaveLearn
Mirror Symmetry and Double Signature ChangeThe black mirror spacetime proposed by Tzanavaris, Boyle, and Turok [1] connects the two exterior regions of the extended Schwarzschild black hole directly to each other, with no intervening interior…Tevian Dray, Charles Hellaby·Jun 19, 2026SaveLearn
Consistency Conditions and the Derivation of Harmonic Structure in Einstein-Maxwell-dilaton TheoryMany exact solutions of Einstein-Maxwell and Einstein-Maxwell-dilaton theory share a common structural pattern in which the metric functions are built from harmonic functions on a specified spatial…Bardia H. Fahim, Joshua G. Fenwick·Jun 19, 2026SaveLearn
Relativistic effects in extreme-mass-ratio inspirals within scalar clouds: Eccentric and inclined orbitsWe study extreme-mass-ratio inspirals (EMRIs) evolving in a scalar cloud environment that may form through superradiant instabilities, using a fully relativistic perturbative framework that allows…Qi-Xuan Xu, Richard Brito, Riccardo Della Monica et al.·Jun 19, 2026SaveLearn
Thermal Stability and QNMs of a Hairy Black Hole in the Presence of a Monopole FieldWe study the stability of a generalization of the GHS-GM black hole in the presence of a dilaton and a monopole field. We find that the thermal behaviour of system depends on the scalar charge of the…George Koutsoumbas, Andri Machattou, Eleftherios Papantonopoulos·Jun 19, 2026SaveLearn
Temperature of free gravitational field: A geometrical perspectiveIn this paper, using a novel geometrical approach, we relate the concept of the thermodynamic temperature of the free gravitational field, to the non-affinity of real null geodesics in a Newman…Samarjit Chakraborty, Gareth Amery, Sunil D Maharaj et al.·Jun 19, 2026SaveLearn
Reconstructing the slope of a nearly flat quintessence potential from cosmographyWe revisit thawing quintessence models with nearly flat scalar-field potentials using a cosmographic framework. Earlier work indicates that the cosmographic reconstruction of the slope λ=-(dV/dϕ)/V…Saikat Chakraborty, Peter K. S. Dunsby, Robert J. Scherrer·Jun 19, 2026SaveLearn
Population-level correlations in Bayesian statistics: an illustrative model for gravitational-wave astronomyWith increasingly large numbers of gravitational-wave events, population inference is now beginning to move beyond predictions of marginal distributions and to probe correlations between…Caroline B. Owen, Alexandre Toubiana, Davide Gerosa·Jun 19, 2026SaveLearn
Probing the Circular Unruh Effect with Cavity-Controlled Lamb ShiftsThe Unruh effect predicts that accelerated observers perceive the inertial vacuum as populated by particles, providing a flat-spacetime analogue of Hawking radiation. Its direct observation, however,…Yan Peng, Jiawei Hu, Hongwei Yu·Jun 19, 2026SaveLearn
Non conservative conformal Killing gravity: coupling the dark sector with curvature and matterThe so called Harada gravity with non conserved energy-momentum tensor is here taken into account. It includes Rastall gravity as a special case. The field equations are written as Einstein equations…Salvatore Capozziello, Carlo Alberto Mantica, Luca Guido Molinari·Jun 19, 2026SaveLearn