⚛️ Category

gr-qc

3784 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.

⚛️ general relativity

Validating Timing-Model Accuracy for Continuous Gravitational Waves: A Comparison of LALSuite and PINT

This paper systematically validates the LALSuite timing model for continuous gravitational waves against the PINT package, demonstrating that while an updated Einstein-delay implementation significantly reduces timing discrepancies to the nanosecond level, residual errors are now primarily driven by the observatory's approximate Earth-rotation model used in the Rømer delay.

Kartikey Sharma, Reinhard Prix, Maria Alessandra Papa, Curt Cutler2026-08-28
⚛️ high-energy theory

Gravitational Compton Amplitude to All Orders in Perturbation Theory

This paper presents a worldline effective field theory framework to compute gravitational Compton scattering amplitudes to all orders in Newton's constant, yielding results up to O(G7)\mathcal{O}(G^7) that reveal a first ultraviolet divergence at that order, demonstrate the vanishing of static Love numbers for Schwarzschild black holes, and predict new subleading non-zero Love numbers.

Miguel Correia, Giulia Isabella, Anna M. Wolz2026-08-28
⚛️ general relativity

Gödel-type universes in Lorentz-violating Kalb-Ramond gravity with Ricci- and Riemann-tensor nonminimal couplings

This paper investigates homogeneous Gödel-type universes in Lorentz-violating Kalb-Ramond gravity with nonminimal Ricci and Riemann curvature couplings, demonstrating how these interactions modify the chronology bound and causal structure of the spacetime while deriving consistency conditions for various vacuum orientations and matter sources.

Fernando M. Belchior2026-08-28
⚛️ general relativity

Comparison of Two-Atom Cross Spectra in de Sitter Spacetime, Uniformly Accelerated Minkowski Vacuum, and a Thermal Bath

This paper compares the two-atom cross spectra of comoving atoms in de Sitter spacetime, uniformly accelerated atoms in the Minkowski vacuum, and static atoms in a thermal bath, revealing that while their local spectra are identical under specific conditions, their spatial correlation behaviors differ significantly due to distinct geometric factors and decay rates at finite separation.

Zhiming Huang2026-08-28
⚛️ general relativity

Relativistic Modeling for Solid Earth Tide Estimation via Space-to-Ground Clock Comparison

This paper proposes a relativistic framework using space-to-ground clock comparisons to estimate solid Earth tide parameters, demonstrating through numerical simulations that while high orbital altitudes cause collinearity between individual Love numbers, a combined h2h_2 and k2k_2 parameter can be stably retrieved within 30 days, with extraction accuracy currently limited by clock stability rather than orbit determination errors.

Qin Li, Wei-Hang Sun, Yu-Jie Tan, Cheng-Gang Qin, Jun Ke, Xiang-Pei Liu, Han-Ning Dai, Tong Liu, Cheng-Gang Shao2026-08-28
⚛️ general relativity

Electric and magnetic Penrose processes, charged-particle collisions and superradiance around a Lorentz-violating dyonic black hole

This paper investigates electromagnetic energy extraction, charged-particle collisions, and superradiance around a Lorentz-violating dyonic Kalb-Ramond black hole, demonstrating that negative-energy states arise from electromagnetic canonical energy rather than a geometric ergoregion and analyzing the resulting Penrose processes, collision dynamics, and potential for black hole overcharging.

Fernando M. Belchior, Edilberto O. Silva2026-08-28