⚛️ Category

gr-qc

3967 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

Anomalous Energy Injection in the Gross-Pitaevskii Framework for Turbulence in Neutron Star Glitches

This study utilizes a damped Gross-Pitaevskii model of a pinned, rotating Bose-Einstein condensate to demonstrate that glitch-like perturbations can trigger a transition from Kolmogorov-like to Vinen-like turbulence, sustained by an anomalous energy injection mechanism driven by quantum pressure, thereby offering qualitative insights into vortex-mediated dynamics in neutron stars.

Anirudh Sivakumar, Pankaj Kumar Mishra, Ahmad A. Hujeirat, Paulsamy Muruganandam2026-02-26
⚛️ general relativity

Semiclassical Gravity Beyond General Relativity: Insights from Torsion

This paper establishes a rigorous semiclassical framework for Einstein--Cartan theory with a nonminimally coupled Klein--Gordon field in four dimensions, utilizing Hadamard renormalization and differential forms to derive well-defined energy-momentum and spin-density expectation values while analyzing the persistence of the conformal anomaly in the presence of torsion.

R. Morales-Cabrera, Y. Bonder2026-02-26
🔬 optics

Lorentz-Violating Wormhole Optics

This paper investigates massless spin-1 field propagation in a static, circularly symmetric (2+1)(2+1)-dimensional Lorentz-violating wormhole, deriving an exact radial equation that reveals the geometry acts as an inhomogeneous optical medium with frequency-dependent confinement and establishing a mathematical equivalence between Lorentz-violation-induced curvature and the twist of helicoidal surfaces like graphene nanoribbons.

Omar Mustafa, Semra Gurtas Dogan, Abdulkerim Karabulut, Abdullah Guvendi2026-02-26
⚛️ general relativity

Beam tube boundary effects in stray light modeling of long Fabry-Perot arm cavities for third-generation gravitational-wave detectors

This paper introduces a waveguide-like mode description to model beam tube boundary effects in third-generation gravitational-wave detectors, demonstrating that such effects are subdominant in densely baffled cavities and thereby validating the continued use of standard FFT-based tools for their design.

M. Andrés-Carcasona, M. Evans2026-02-26
⚛️ general relativity

Natural Emergence of LCDM Cosmology within General Relativity from Two Alternative Frameworks Without Fine-Tuning and Coincidence

This paper proposes that the standard Λ\LambdaCDM cosmological model naturally emerges within General Relativity through a dynamic breaking of energy-momentum symmetry in the quantum interpretation of the cosmological constant, thereby resolving the fine-tuning and coincidence problems without requiring exotic fields or fine-tuning.

H. R. Fazlollahi2026-02-26
⚛️ high-energy theory

Direction-of-arrival estimation of a gravitational wave by correlations between quadrupole moments of pulsar timings

This paper proposes a method to estimate the direction of arrival of gravitational waves from isolated sources, such as supermassive black hole binaries, by analyzing the rank-2 traceless correlation matrix of quadrupole moments in pulsar timing data, demonstrating its potential for high angular resolution with future observatories like the Square Kilometer Array.

Taichi Ueyama, Hodaka Tamura, Hideki Asada2026-02-26
⚛️ general relativity

Linear Perturbations and Multi-Probe Diagnostics in Dark-Sector Selective f(R,Tχ)f(R,T_χ) Gravity

This paper develops a dark-sector selective f(R,Tχ)f(R,T_\chi) gravity model that couples curvature exclusively to dark matter to resolve theoretical ambiguities, derives its linear perturbation equations to predict scale- and time-dependent deviations from General Relativity, and establishes a multi-probe framework using redshift-space distortions and lensing to constrain these effects beyond background expansion tests.

L. Yildiz, D. Kayki, E. Gudekli2026-02-26