⚛️ Category

gr-qc

3773 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.

⚛️ high-energy theory

A Quantum Circuit Model of Black Hole Evaporation with Tunable Semi-Causality Violation

This paper introduces a tunable four-qubit quantum circuit model of black hole evaporation that extends Broda's semi-causal framework by incorporating a controlled unitary gate, demonstrating that while global unitarity is preserved, any deviation from strict semi-causality (σ>0\sigma > 0) leads to incomplete purification of outgoing radiation and residual entanglement, with the magnitude of residual entropy scaling as −σ2ln⁡σ2-\sigma^2 \ln \sigma^2 in the small-leakage regime.

Sourav Ballav, Wen-Yu Wen, Chi-Hsien Tai2026-09-09
⚛️ general relativity

Rotating Fermion-Boson Stars in RR-squared Gravity

This paper constructs static and rotating fermion-boson star models within RR-squared gravity, demonstrating that the modified gravitational framework enlarges the range of stable equilibrium solutions and increases maximum supported masses compared to general relativity while remaining consistent with current astrophysical constraints.

Saeed Fakhry, Jorge Castelo Mourelle, Nicolas Sanchis-Gual, Daniela Doneva, Stoytcho Yazadjiev, José A. Font2026-09-09
⚛️ general relativity

Corrected thermodynamics and radiation predictions of modified black bounce compact objects

This paper investigates the thermodynamic properties, radiation characteristics, and linear stability of a Simpson-Visser regularized modified gravity black hole, revealing phase transitions, deriving effective temperatures for horizonless wormhole branches, and demonstrating stability against monopole perturbations.

Shokhzod Jumaniyozov, Javlon Rayimbaev, Yassine Sekhmani, Satimbay Palvanov, Olmos Tursunboyev, Dilshod Karshiev2026-09-09
⚛️ general relativity

Effective Field Theory of Gravity in Relativistic Media

This paper develops a unified effective field theory of gravity in relativistic media that treats different environments as variations of the same vacuum diagram topologies with updated propagators and vertices, thereby predicting novel phenomena such as resonant black hole Love numbers, gravitational opacity, and anisotropic Christodoulou memory with significant observational prospects for next-generation detectors.

Beka Modrekiladze2026-09-09✓ Author reviewed ⓘ
⚛️ general relativity

Thin accretion disk and gravitational capture cross sections of a quantum Oppenheimer--Snyder black hole immersed in an external magnetic field

This paper investigates the properties of thin accretion disks and gravitational capture cross sections for a quantum Oppenheimer--Snyder black hole immersed in an external magnetic field, revealing that while the quantum parameter only weakly influences disk observables and shrinks capture cross sections, the magnetic coupling significantly enhances radiative efficiency and spectral peaks while enlarging the capture cross section for massive particles.

Anuar Idrissov, Hernando Quevedo2026-09-09
⚛️ general relativity

Cycles Without End: An Ekpyrotic Braneworld Bounce with a Kinetically Coupled Entropic Mechanism

This paper presents an explicit cyclic cosmology model that resolves the historical challenges of singular bounces, blue spectral tilt, and entropy accumulation by utilizing a Randall-Sundrum brane with a timelike extra dimension and a kinetically coupled entropic field to achieve a non-singular bounce, a nearly scale-invariant spectrum, and entropy dilution through dark energy.

Rikpratik Sengupta2026-09-09