⚛️ Category

gr-qc

3826 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

No late-time role for adiabatic torsion: a no-go result for Hubble-cutoff holographic dark energy in Einstein--Cartan cosmology

This paper demonstrates that adiabatic torsion in Einstein--Cartan cosmology cannot rescue the Hubble-cutoff holographic dark energy model to explain late-time acceleration or DESI anomalies, as it produces only a transient acceleration window and is strictly constrained by observational data to have a negligible impact on the dark energy equation of state.

Fernando Izaurieta, Samuel Lepe, Cristian Quinzacara2026-07-21
🔭 astrophysics

Rolling Galileons: Evolving Braiding Strength for Viable Dark Energy

This paper introduces "Rolling Galileon" gravity, a minimal extension of cubic Galileon theory with evolving coupling coefficients, and demonstrates that models featuring an increasing braiding strength can simultaneously satisfy key phenomenological requirements—such as a phantom-crossing equation of state and a positive integrated Sachs-Wolfe signature—while remaining consistent with observational expansion-history data.

James Hallam, Krishna Naidoo, Sergi Sirera, Tessa Baker2026-07-21
⚛️ general relativity

Probing f(R) AdS Black Hole via Hawking Evaporation, Shadows and Thermal Fluctuations

This paper numerically investigates the Hawking evaporation, shadow properties, and thermodynamic stability of f(R) AdS black holes, revealing that they form infinite-lifetime remnants, exhibit parameter-dependent shadow sizes and photon ring appearances, and undergo specific phase transitions influenced by coupling parameters.

Muhammad Israr Aslam, Saira Waheed, Rabia Saleem, Nazek Alessa2026-07-21
🔭 astrophysics

A Four-Dimensional Gaussian Random Field Generator for Modeling Spatiotemporal Variability in Astrophysical Sources

This paper presents a unified, implementation-ready model that combines an off-equatorial, nongeodesic Kerr fluid rotation law with a four-dimensional Matérn-like Gaussian random field to generate time-dependent, thick-disk, and disk-jet emission prescriptions for semi-analytic black-hole movie simulations.

Alejandro Cárdenas-Avendaño, Diego Rubiera-Garcia, Frederic H. Vincent2026-07-21
⚛️ general relativity

Axial Obstructions to Rotating Bumblebee Vacuum Solutions

This paper demonstrates that rotating bumblebee vacuum solutions in Einstein-bumblebee gravity generally suffer from axial obstructions—specifically the impossibility of maintaining a smooth, constant-norm vector field at the poles and the emergence of curvature singularities from position-dependent conicity—though a specific nonextremal branch remains regular away from the polar axes.

Minyong Guo, Zhong-Ying Fan2026-07-21
⚛️ general relativity

Probing Primordial Cosmology Through BBN Observational Constraints Under Extended Gravitational Dynamics

This paper investigates the viability of an extended f(R,G,T)f(R,G,\mathcal{T}) gravitational framework by analyzing four representative models against Big Bang nucleosynthesis constraints, demonstrating that significant deviations from standard cosmology remain consistent with observed primordial light-element abundances.

Abdul Malik Sultan, Manahil Ali, Muhammad Israr Aslam, Nazek Alessa2026-07-21
⚛️ general relativity

One Year and One Night to 1% in H0\mathbf{H_0}: Efficient Spectroscopic Strategy for Dark Siren Cosmology

This paper proposes an efficient spectroscopic strategy requiring just one to five nights of follow-up observations to achieve a 1% precision measurement of the Hubble constant (H0H_0) using dark siren events from the LIGO-India network at A# sensitivity.

Yixuan Dang, Ariel J. Amsellem, Ignacio Magaña Hernandez, Antonella Palmese, B. S. Sathyaprakash2026-07-21