Quantum Critical Collapse Abhors a Naked SingularityClassical critical collapse yields naked singularities from smooth initial data, challenging cosmic censorship, and shaping the spectrum of primordial black holes. We show that one-loop vacuum…Marija Tomašević, Chih-Hung Wu·May 14, 2026SaveLearn
Unveiling horizons in quantum critical collapseCritical gravitational collapse offers a unique window into regimes of arbitrarily high curvature, culminating in a naked singularity arising from smooth initial data -- thus providing a dynamical…Marija Tomašević, Chih-Hung Wu·May 14, 2026SaveLearn
Charged, rotating black holes in Einstein-Maxwell-dilaton theoryThe asymptotically flat, electrically charged, rotating black holes (BHs) in Einstein-Maxwell-dilaton (EMd) theory are known in closed form for only two particular values of the dilaton…Carlos Herdeiro, Eugen Radu, Etevaldo dos Santos Costa Filho·May 14, 2026SaveLearn
On the Limits of the Thermofield-Double Interpretation of the Minkowski VacuumThe Minkowski vacuum is often presented in textbooks and reviews as a thermofield double (TFD) state, an entangled state of field modes in the left and right Rindler wedges. This picture is widely…Vaibhav Wasnik·May 14, 2026SaveLearn
Properties of natural polynomials for Schwarzschild and Kerr black holesThe quasi-normal modes of black holes play various important roles in gravitational wave theory, signal modeling, and data analysis; however, there remain open questions about their mathematical…Michelle Foucoin, Lionel London·May 13, 2026SaveLearn
Reflecting Gravitons: The Graviton Laser and the Gertsenshtein effectGraviton lasers have been considered in the past, gl, but practical terrestrial implementations appear infeasible. The absence of any known mechanism to reflect gravitons means that it remains…Thomas Forget, M. B. Paranjape, Urjit Yajnik·May 13, 2026SaveLearn
A No-Go Theorem for Topological Bridges with Matter-Vacuum CouplingTraversable topological bridges traditionally require exotic matter, violating the Null Energy Condition (NEC). This essay investigates whether matter-vacuum coupling can circumvent this necessity.…Rodrigo Maier·May 13, 2026SaveLearn
Multipolar Proca stars: electric, magnetic and hybrid solitonsWe construct new families of everywhere regular, asymptotically flat solitons in the Einstein--Proca model, obtained as self-gravitating continuations of flat-spacetime (singular) Proca multipoles.…Carlos Herdeiro, Eugen Radu, Etevaldo dos Santos Costa Filho et al.·May 13, 2026SaveLearn
When Bumblebee Meets NLED: Lorentz-Violating Black Holes and Regular SpacetimesWe construct charged black hole solutions in bumblebee gravity coupled to a general class of nonlinear electrodynamics (NLED) using an auxiliary Maxwell-scalar formalism. The norm-fixed radial…Zhi-Chao Li, H. Lu·May 13, 2026SaveLearn
No-go theorem for spontaneous vectorizationGeneralized vector-tensor theories of gravity have drawn attention for admitting hairy black hole solutions, thereby circumventing the standard no-hair theorems. It remains an open question, however,…Hsu-Wen Chiang, Sebastian Garcia-Saenz, Aofei Sang·May 13, 2026SaveLearn
Thermodynamics and optical aspects of ModMax black holes in higher order curvature gravity with quintessence dark energyIn this work, we derive an exact black hole solution in higher-order curvature gravity by coupling an electromagnetic sector formulated within the ModMax framework to a quintessence dark energy…Ahmad Al-Badawi, Usman Zafar, Abdul Jawad et al.·May 13, 2026SaveLearn
Thin Accretion Disks around Rotating Charged Black Holes in an Effective Higher-Curvature SpacetimeWe investigate the structure and emission properties of a thin accretion disk around a rotating charged black hole described by an effective higher-curvature-inspired spacetime, constructed as a…Mohammad Hassani, Kourosh Nozari, Sara Saghafi·May 13, 2026SaveLearn
Quantum Field Theory of Black Hole Perturbations with Backreaction VI. Apparent Horizons, Quasi-Local Mass and Effective Classical MetricsIn a recent series of papers we developed a first-principle and gauge invariant approach to black hole perturbation theory valid to any order. We included back reaction effects to tackle the…Jonas Neuser, Thomas Thiemann·May 13, 2026SaveLearn
Cosmological horizons in regular bouncing backgroundsIt is often stated that a phase of standard, decelerated cosmological expansion is characterised by the absence of global event horizons, while a phase of accelerated expansion is associated with the…M. Gasperini·May 13, 2026SaveLearn
When Weak Fields Arent Weak: Post-Newtonian effective theory and the Dark Matter PuzzlePost-Newtonian theory is considered a reliable effective expansion of General Relativity in the weak-field and slow-motion limit. We argue that such a belief is misplaced. In generic many-body…Marco Galoppo, Giorgio Torrieri·May 13, 2026SaveLearn
Quantum resolution of the Schwarzschild singularityWe revisit the Schwarzschild singularity in a semiclassical setting where the background geometry is classical and quantum effects enter through Bohmian (quantal) trajectories associated with a Klein…Vishnulal Cheriyodathillathu, Tanmay Patil, Saurya Das et al.·May 13, 2026SaveLearn
Observational signatures of misaligned double-ring and double-torus configurations around a Schwarzschild black holeWe investigate the observational signatures of an idealized double-ring and double-torus system orbiting a Schwarzschild black hole, allowing the two emitting components to have mutually inclined…Dmitriy Ovchinnikov, Jan Schee, Zdeněk Stuchlík·May 13, 2026SaveLearn
Geodesics Structure and Thermodynamic Properties of Gaussian Black Hole in Quadratic Ricci Scaler GravityThe geodesic structure and thermal properties of Gaussian Black Holes (GBH)s in modified and Einstein gravities are studied and compared. In the geodesic part, motion of a test particle…M. Haditale, B. Malekolkalami·May 13, 2026SaveLearn
Fixing the Renormalization of Inflationary Loops via Ward IdentitiesEvaluating quantum loop corrections to curvature perturbations in non-attractor inflation presents theoretical ambiguities. A crucial aspect of this challenge lies in the unconstrained finite…Cheng-Jun Fang, Zong-Kuan Guo·May 13, 2026SaveLearn
The Gravitational Spectral Radio Forest: A Signature of Primordial Black HolesWe propose a novel gravitational signature to detect Primordial Black Hole (PBH) dark matter by treating interstellar hydrogen as a quantum sensor for spacetime curvature. Focusing on H II regions,…P. George Christopher, K. Hari, S. Shankaranarayanan·May 13, 2026SaveLearn
Inspiral gravitational waveforms from charged compact binaries with scalar hairWe investigate gravitational waveforms from compact binary systems in Einstein-scalar-Maxwell (ESM) theories, where a scalar field ϕ couples to a U(1) gauge field Aμ through a field-dependent…Antonio De Felice, Shinji Tsujikawa·May 13, 2026SaveLearn
On the Geometry of Cotton GravityWe analyze the geometry of the field equations of Cotton gravity (for a quite general energy-momentum tensor) on a static space-time. In particular, we describe the local structure of the spatial…Giulio Colombo, Filippo Mastropietro, Marco Rigoli·May 13, 2026SaveLearn
A Constraint-Free Formulation of Black Hole Thermodynamics from the Field EquationsWe develop a constraint-free formulation that generalizes Padmanabhan's method for deriving the first law of black hole thermodynamics directly from the Einstein field equations. In previous…Geonwoo Ahn, Ijin Bae, Geunyeong Jang et al.·May 13, 2026SaveLearn
Photon Spheres and Shadows of Black Holes with Modified Entropy-Inspired MetricsStarting from the first law of black hole thermodynamics, we establish an explicit correspondence between the corrected entropy and the metric function under the condition of fixed black hole energy…Fang Liu, Yu-Bo Ma, Yun-Zhi Du et al.·May 13, 2026SaveLearn
Scalar, electromagnetic, and Dirac perturbations of regular black holes constituting primordial dark matterWe study massless scalar, electromagnetic, and Dirac perturbations of the exact asymptotically flat regular black hole supported by a phantom Dirac--Born--Infeld scalar. Using the Padé-improved WKB…Bekir Can Lütfüoğlu·May 13, 2026SaveLearn