⚛️ Category

gr-qc

3949 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

Unexpectedly Weak General Relativistic Effects in Strongly Relativistic Tidal Disruption Events

Contrary to the prevailing belief that strong relativistic effects rapidly dissipate orbital energy to form prompt accretion disks, general relativistic hydrodynamic simulations reveal that even in strongly relativistic tidal disruption events, debris remains highly eccentric and extended with circularization occurring intrinsically slowly due to stream self-interactions that weaken relativistic shocks.

Ho-Sang Chan, Taeho Ryu, Julian Krolik, Tsvi Piran2026-03-12
⚛️ general relativity

Polymerized spacetime dynamics with multi-field source: unraveling the pre-inflationary Universe

This paper investigates a multi-field model within Loop Quantum Cosmology using a polymerized spacetime framework to derive quantum-corrected Friedmann equations, numerically analyzing the transition from a quantum bounce to slow-roll inflation and assessing the model's viability through stability and dynamical systems analyses.

Divya Gupta, Manabendra Sharma, Gustavo S. Vicente, Rudnei O. Ramos, Anzhong Wang2026-03-12
⚛️ general relativity

Thermodynamically massless Simpson-Visser black holes

This paper demonstrates that within Einstein gravity coupled to nonlinear electrodynamics and a phantom scalar field, the Simpson-Visser regular black hole possesses a vanishing thermodynamic mass due to boundary contributions, yet remains thermodynamically less favorable than its singular counterpart when compared under identical thermal and magnetic conditions.

Thanasis Karakasis, Emmanuel N. Saridakis, Zi-Yu Tang2026-03-12
🔭 astrophysics

The Formulation of Scaling Expansion in an Euler-Poisson Dark-fluid Model

This paper presents a dark fluid model described as a non-viscous, non-relativistic, rotating, and self-gravitating fluid with spherical symmetry and a polytropic equation of state, which is solved using a self-similar time-dependent ansatz to derive new solutions consistent with the Newtonian cosmological framework that can describe the transition from normal matter to dark energy on cosmological scales.

Balázs Endre Szigeti, Imre Ferenc Barna, Gergely Gábor Barnaföldi2026-03-11
🔭 astrophysics

Euclid: Constraints on f(R) cosmologies from the spectroscopic and photometric primary probes

This study forecasts that the Euclid mission will significantly constrain the Hu-Sawicki f(R)f(R) modified gravity parameter fR0f_{R0}, achieving approximately 1% precision when combining spectroscopic and photometric probes and enabling the distinction of these models from the standard Λ\LambdaCDM cosmology at greater than 3σ\sigma confidence.

S. Casas, V. F. Cardone, D. Sapone, N. Frusciante, F. Pace, G. Parimbelli, M. Archidiacono, K. Koyama, I. Tutusaus, S. C (…)2026-03-11
⚛️ general relativity

Local coordinates and motion of a test particle in the McVittie spacetime

This paper analyzes the orbital motion of a test particle in the McVittie spacetime using local coordinates and osculating elements to demonstrate that while cosmological expansion does not affect the orbit's size up to second order, it induces a time-dependent precession and alters the mean orbital frequency, with the precession direction determined by the Hubble and deceleration parameters.

Vishal Jayswal, Sergei M. Kopeikin2026-03-11
⚛️ general relativity

Massive particle surfaces and black hole shadows from intrinsic curvature

This paper generalizes a recent geometric approach for studying massive particle surfaces to stationary spacetimes by utilizing a projected 2-dimensional Riemannian metric to characterize null and timelike trajectories via intrinsic curvatures, thereby enabling the analysis of black hole shadows in non-asymptotically flat solutions like Kerr and Kerr-(A)dS.

Boris Bermúdez-Cárdenas, Oscar Lasso Andino2026-03-11
🔭 astrophysics

One-loop renormalization of the effective field theory of inflationary fluctuations from gravitational interactions

This paper demonstrates that within the Effective Field Theory of inflation, one-loop gravitational corrections to primordial power spectra can be fully renormalized using dimensional regularization, resulting in exactly conserved scalar and tensor spectra on super-horizon scales and proving that propagation speeds remain immune to radiative corrections from gravitational nonlinearities.

Matteo Braglia, Lucas Pinol2026-03-11