gr-qc papers | Gist.Science

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.

Self-consistent neutron stars in a class of massive vector-tensor gravity

This paper resolves the inconsistency in constructing self-consistent neutron star solutions within Einstein-bumblebee gravity by demonstrating that the global vanishing-potential assumption can be abandoned, as the potential is dynamically restored in the weak-field regime while remaining non-zero only in the strong-field interior, thereby extending the theory's viability to compact stars without compromising its black hole solutions or observational constraints.

Zhe Luo, Shoulong Li, Hongwei Yu2026-03-23⚛️ gr-qc

Modified Teleparallel $f(T)$ Gravity, DESI BAO and the $H_0$ Tension

This paper investigates three late-time $f(T)$ gravity models using DESI BAO and other cosmological data to determine if torsional modifications can alleviate the $H_0$ tension, finding that while phantom-like regimes can partially shift the Hubble constant toward local measurements, none of the models are statistically preferred over the standard $\Lambda$ CDM model.

Mariam Bouhmadi-López, Carlos G. Boiza, Maria Petronikolou, Emmanuel N. Saridakis2026-03-23⚛️ gr-qc

Operational measurement of relativistic equilibrium from stochastic fields alone

This paper proposes and validates via Monte Carlo simulations a novel protocol that directly reconstructs the relativistic inverse-temperature four-vector from electromagnetic fluctuation correlations in a drifting medium, offering the first experimental method to resolve the century-old controversy regarding the transformation properties of relativistic thermal states without relying on external probes or absolute calibration.

Ira Wolfson2026-03-23⚛️ gr-qc

CMB anisotropies from cosmic (super)strings in light of ACT DR6

This paper presents updated, significantly tighter constraints on the tension of both ordinary cosmic strings and cosmic superstrings by analyzing full Planck and ACT DR6 CMB data, while also releasing a modified CAMB pipeline for computing anisotropies from active networks.

Juhan Raidal, Anastasios Avgoustidis, Edmund Copeland, Adam Moss2026-03-23⚛️ gr-qc

Recursive Penrose processes in electrically charged black hole spacetimes: Backreaction and energy extraction

This paper demonstrates that in Reissner-Nordström-AdS spacetimes, a recursive Penrose process involving charged particle decays and natural confinement yields a finite energy extraction while the black hole's backreaction ensures the process terminates before violating cosmic censorship or triggering a black hole bomb.

Duarte Feiteira, José P. S. Lemos, Oleg B. Zaslavskii2026-03-23⚛️ gr-qc

Observational imprints and quasi-Periodic oscillations of magnetically charged anti-de Sitter black holes

This paper investigates the observational signatures of magnetically charged Anti-de Sitter black holes in string-inspired Euler-Heisenberg theory, demonstrating that magnetic charge alters photon trajectories, orbital frequencies, and the innermost stable circular orbit, while twin-peak quasi-periodic oscillation data constrain the magnetic charge parameter to be less than approximately 0.2 times the black hole mass at the 1 sigma confidence level.

Faizuddin Ahmed, Mohsen Fathi, Ahmad Al-Badawi2026-03-23⚛️ gr-qc

Bound States in Scalar Theory with Fourth-order Derivative Term

This paper demonstrates that in a scalar theory with a fourth-order derivative term, strong attractive interactions can generate bound states of massive ghosts and normal fields, offering a potential mechanism for ghost confinement that may resolve unitarity violations in quadratic gravity.

Ichiro Oda2026-03-23⚛️ hep-th

On the Universal Cuspy Behavior in Black Hole Shadows

This paper establishes that cusp formation in black hole shadows exhibits universal characteristics—including topological charge transitions, an equal-area law, and critical scaling—that are independent of specific spacetime metrics, applying to both Kerr black holes with running Newton coupling and rotating traversable wormholes.

Peng Cheng, Si-Jiang Yang2026-03-23⚛️ gr-qc

Microstate Counting for rotating (type~II) isolated horizons

This paper proposes a method for counting black hole microstates in Loop Quantum Gravity for rotating (type II) isolated horizons by decomposing the horizon into locally nonrotating concentric rings to restore a local Chern-Simons description, thereby successfully incorporating angular momentum and satisfying the first law of black hole mechanics.

Pritam Nanda2026-03-23⚛️ gr-qc

Analytical Solution of Spinning, Eccentric Binary Black Hole Dynamics at the Second Post-Newtonian Order

This paper presents a first-principles analytical solution for the time evolution of the separation, spin, and orbital angular momentum vectors of spinning, eccentric binary black holes at the second post-Newtonian order, offering a significant improvement over previous heuristic models despite minor limitations in spin oscillation accuracy.

Tom Colin, Sashwat Tanay, Laura Bernard2026-03-23⚛️ gr-qc

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