⚛️ Category
gr-qc
3151 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.
Integrability of Conformal Killing Vectors in the Eisenhart Lift of Scalar-Field FLRW Cosmology
This paper proves that the potential previously identified for a scalar-field FLRW universe is the most general local potential allowing for non-trivial conformal Killing vectors by demonstrating that all other mathematical solutions to the integrability conditions are either singular or incompatible with the full equations.
Signature of iron line profile from a Kerr-like wormhole
The paper demonstrates that while "Kerr-like" wormholes can mimic black hole signatures when using simple convolutional models, they can be distinguished from black holes in high-quality X-ray spectra through the use of self-consistent relativistic reflection models.
Light deflection and shadow of charged black hole in a Born-Infeld-type electrodynamics
This paper investigates how nonlinear Born-Infeld-type electrodynamics affects the spacetime geometry of a charged black hole, demonstrating that the parameter significantly modifies observational signatures such as light deflection, shadow size, and accretion disk images through changes in the effective photon geometry.
Super-Heisenberg protocol for dark matter and high-frequency gravitational wave search
This paper proposes a quantum-enhanced sensing protocol using spin-motion squeezed states in two-dimensional ion crystals within a Penning trap to achieve super-Heisenberg scaling for detecting wave-like dark matter and high-frequency gravitational waves.
Simulation-based Inference for Gravitational Waves from Binary Neutron Stars: Application of Summary Data from Heterodyning
This paper proposes a novel, computationally efficient compression strategy for binary neutron star gravitational-wave signals using likelihood-oriented summary statistics derived from heterodyning, enabling fast and well-calibrated neural posterior estimation.
Graviton propagation in ghost-free massive gravity
The paper proves that in ghost-free dRGT massive gravity with two mass terms, the helicity-2 gravitational modes always propagate on the metric lightcone in the high-frequency limit, regardless of the background spacetime.
Kahler decoupling for Kerr perturbations
This paper demonstrates that the decoupling of curvature perturbations in the Kerr metric (such as the Teukolsky equations) is a direct consequence of a hidden Kähler geometry, where the self-dual nature of the background allows differential operators to preserve component decompositions without mixing them.
Spontaneous spherical symmetry breaking of black holes with resonant hair
This paper demonstrates that static, spherical black holes with resonant hair are dynamically unstable and undergo spontaneous symmetry breaking, ultimately splitting into a bosonic lump and a bald black hole or imploding into one through non-spherical processes.
How lonely are the Binary Compact Objects Detected by the LIGO-Virgo-KAGRA Collaboration?
By searching for gravitational-wave distortions caused by three-body encounters in the LVK catalog, this study finds no significant evidence of nearby companions, thereby establishing the first upper bounds on the presence of intermediate-mass black holes in the immediate vicinity of these binary events.