⚛️ Category

gr-qc

3285 papers

Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.

At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.

Isolated or Dynamical? Tracing Black Hole Binary Formation through the Population of Gravitational-Wave Sources

This study utilizes the B-POP semi-analytic code to model binary black hole formation through both isolated evolution and dynamical interactions, demonstrating that a combined framework can reproduce observed merger rates and properties while highlighting the significant astrophysical complexities that currently hinder definitive conclusions about the origins of specific gravitational-wave events.

Manuel Arca Sedda, Lavinia Paiella, Cristiano Ugolini, Filippo Santoliquido, Benedetta Mestichelli, Ilaria Usai, Filippo Simonato, Marica Branchesi2026-03-24🔭 astro-ph

Accurate and efficient simulation-based inference for massive black-hole binaries with LISA

This paper presents an extension of the DINGO framework to LISA, utilizing simulation-based inference with normalizing flows to achieve rapid, accurate, and unbiased parameter estimation for massive black-hole binaries across a wide range of signal-to-noise ratios.

Alice Spadaro, Jonathan Gair, Davide Gerosa, Stephen R. Green, Riccardo Buscicchio, Nihar Gupte, Rodrigo Tenorio, Samuel Clyne, Michael Pürrer, Natalia Korsakova2026-03-24🔭 astro-ph

Singular structures and causality of the Schwarzschild Green's function in the frequency domain

This paper provides a mathematical foundation for the frequency-domain interpretation of the Schwarzschild Green's function by analyzing its singular spectral components to explain how low-frequency branch cuts and quasinormal modes generate distinct tail behaviors and redshifted responses depending on source location, thereby validating phenomenological ringdown models.

Romeo Felice Rosato, Marina De Amicis, Paolo Pani2026-03-24⚛️ gr-qc

Canonical and Grand-Canonical Singular Ensembles within a Thermodynamicized Gravity Framework

This paper proposes a unified gravitational-thermodynamic framework that utilizes contour integration and residue analysis to characterize the singular behaviors of a closed stellar-like canonical ensemble and an open galactic-like grand-canonical ensemble, thereby establishing a geometric bridge between local singularities and global thermodynamic observables in self-gravitating relativistic systems.

Wen-Xiang Chen2026-03-24⚛️ gr-qc

Branch-dependent ringdown in black-bounce spacetimes: imprints of matter-source ambiguity on quasinormal modes

This paper demonstrates that the inherent ambiguity in matter-source interpretations (specifically between anisotropic fluids and nonlinear electrodynamics coupled to a scalar field) in Simpson-Visser spacetimes leaves distinct, branch-dependent imprints on gravitational ringdown waveforms, thereby offering a novel pathway to break this degeneracy through gravitational-wave spectroscopy.

Hao Yang, Chen Lan2026-03-24⚛️ gr-qc

Breaking the degeneracy among regular black holes with gravitational lensing

This paper demonstrates that while Event Horizon Telescope observations provide tight constraints on the parameters of Culetu, Bardeen, and Hayward regular black holes, breaking the degeneracy among their microscopic cores requires analyzing high-order signatures like Lyapunov exponents and the inversion of brightness hierarchies in accretion flows, as standard geometric observables remain insufficient for distinguishing these non-singular geometries.

Hong Liu, Xiaolong Liao, Yi Zhang2026-03-24⚛️ gr-qc

A Rigorous Jacobi-Metric Approach to the Gauss-Bonnet Lensing of Spinning Particles: Extension to Quadrupole Order

This paper establishes a generalized geometric framework using the Gauss-Bonnet theorem and Jacobi metric to derive an analytical formula for the gravitational deflection of massive spinning particles in Schwarzschild spacetime, demonstrating that spin-induced quadrupole moments generate non-geodesic forces that produce a measurable deflection correction proportional to the quadrupole constant and spin squared.

Hoang Van Quyet2026-03-24⚛️ gr-qc

Generalized JMN Naked Singularity Models

This paper constructs a generalized class of Joshi-Malafarina-Narayan naked singularity models with radially dependent mass functions and non-vanishing tangential pressure, demonstrating that while accretion disk spectra exhibit enhanced high-frequency emission, the resulting shadow remains indistinguishable from a Schwarzschild black hole when the photon sphere lies in the exterior region, thereby confirming the robustness of JMN-type geometries as small perturbations.

Jay Verma Trivedi, Pankaj S. Joshi2026-03-24⚛️ gr-qc

First-principle evolution Hamiltonian operator: derivation from ADM quantum constraints and quantum reference-frame conditions

This paper derives a universal, first-principle formula for the exact evolution Hamiltonian operator in a variable quantum reference frame, expressed solely in terms of quantum-constraint and frame-condition operators, which generates Schrödinger evolution for genuine relational observables within the physical Hilbert space of Dirac quantum gravity.

Chun-Yen Lin2026-03-24⚛️ gr-qc