482 papers
This paper derives perturbative corrections to the Weinberg soft graviton theorem and the supertranslation Ward identity for tree-level scattering in the static patch of de Sitter space, demonstrating that the corrected Ward identity consistently reduces to the soft theorem in the small cosmological constant limit.
This paper resolves the ambiguity of field space geometry in gravitational effective field theories by developing a frame-covariant framework that interprets conformal frames as distinct foliations of a higher-dimensional auxiliary geometry, thereby demonstrating that key Swampland Distance Conjectures are universal consequences of frame covariance rather than specific quantum gravity constraints.
This paper investigates how a time-dependent Newton constant and non-conserved energy-momentum tensor, constrained by the Bianchi identity and thermodynamic principles, lead to specific power-law relations between and black hole mass that determine the black hole's evaporation behavior and temperature evolution based on the chosen entropy definition.
This paper presents a coordinate-invariant formalism using eigenmode expansion to model the interaction between gravitational waves and resonant detectors, specifically deriving coupling coefficients that account for damping and back-action to facilitate numerical analysis of high-frequency experiments in arbitrary electromagnetic cavity geometries.
This paper presents a new family of multi-centered extremal rotating black hole solutions in five-dimensional vacuum Einstein gravity, constructed by promoting harmonic functions of the Myers-Perry solution to multiple sources, which yield smooth, singularity-free spacetimes with bubble-supported binary configurations and no closed timelike curves.
By modeling black hole evaporation through metastring theory's metaparticles as entangled geometric and dual sectors, this paper demonstrates that enforcing entropy reality naturally yields a minimal horizon area, resulting in a finite maximal temperature and a stable, non-singular remnant that is fundamentally non-geometric in nature.
This paper demonstrates that force-free electrodynamics in Minkowski spacetime possesses conformal symmetry under Möbius transformations, which links known solutions by mapping the interior of a magnetospheric horizon to the exterior of its dual counterpart.
This paper demonstrates that while the lowest-order Blandford-Znajek jet power is universal across generic stationary and axisymmetric black-hole spacetimes, the next-leading-order corrections depend on the specific spacetime geometry, offering a potential method to distinguish rapidly rotating black holes through combined measurements of jet luminosity and angular velocity.
This paper introduces Lovelock-type brane gravity (LBG) as a second-order extension of geodetic brane gravity within an elasticity framework, demonstrating how it can be reformulated as mimetic embedding gravity where a fictional current generates an effective energy-momentum tensor with perfect fluid characteristics.
This paper investigates the properties and observational signatures of electrically charged exotic compact objects in Einstein-scalar-Maxwell theories, demonstrating their shell-like structure and establishing constraints on model parameters by analyzing photon rings, gravitational lensing, and innermost stable circular orbits.
This paper presents a rigorous 3BF model of quantum gravity coupled to Standard Model matter within higher gauge theory, achieved by discretizing the action and path integral on a piecewise-flat spacetime manifold to enable a well-defined quantum formulation and preliminary semiclassical analysis.
This paper investigates an acoustic black hole within Hayward spacetime derived from relativistic Gross-Pitaevskii theory, numerically analyzing its shadow, quasinormal modes, and analogue Hawking radiation to demonstrate how a tuning parameter enhances emission rates and shadow size while stabilizing oscillation frequencies through effective potential modifications.
This paper demonstrates that a universal propagation scale and an emergent Lorentzian causal structure can arise dynamically from purely relational, scale-invariant -body dynamics on shape space, suggesting that relativistic kinematics may originate from the spectral properties of configuration geometry.
This paper proposes a unified cosmological origin where a broad enhancement of the primordial curvature power spectrum simultaneously explains the existence of planet-mass primordial black holes as dark matter and the nanohertz stochastic gravitational-wave background detected by pulsar timing arrays.
This paper investigates the analytical dynamics of spinning particles in pp-wave spacetimes, including plane gravitational and impulsive shockwaves, by utilizing specific spin supplementary conditions and Hamiltonian formalisms to establish a relationship between these motions and electromagnetic fields via gauge-gravity duality.
This paper introduces "Deep Horizon," a machine learning framework utilizing two convolutional neural networks to accurately recover black hole physical parameters from simulated Event Horizon Telescope images, demonstrating that while current ground-based resolution limits recovery to mass and accretion rate, higher-resolution space-based observations at 690 GHz would enable the precise estimation of additional parameters including spin and viewing angle.
The Event Horizon Telescope collaboration successfully imaged the supermassive black hole at the center of galaxy M87, revealing a bright asymmetric ring surrounding a dark shadow consistent with general relativity predictions and enabling a precise mass measurement of approximately 6.5 billion solar masses.
This paper reports the first direct detection of gravitational waves on September 14, 2015, originating from the merger of a binary stellar-mass black hole system, a discovery that confirms the existence of such binaries and validates key predictions of general relativity.