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.

⚛️ general relativity

Probing Hernquist dark matter through the optical appearance of black holes: A comprehensive study of various accretions

This study systematically analyzes how a Hernquist dark matter halo alters the optical appearance of a Schwarzschild black hole under three accretion scenarios, revealing that the halo significantly enlarges the photon sphere and suppresses brightness, thereby offering a theoretical framework to constrain dark matter distributions in galactic centers through black hole imaging.

Yuxuan Shi, Hongbo Cheng2026-03-31

⚛️ general relativity

From negative to positive cosmological constant through decreasing temperature of the Universe: connection with string theory and spacetime foliation results

This paper proposes a modified thermal Renormalization Group framework, where a constant dimensionless temperature drives the cosmological constant to transition from negative (consistent with string theory at high temperatures) to positive (consistent with observations at low temperatures), thereby resolving the discrepancy between theoretical predictions and the observed accelerating expansion of the Universe.

E. N. Nyergesy, I. G. Márián, A. Trombettoni, I. Nándori2026-03-31

⚛️ general relativity

Encounter between an extended hyperelastic body and a Schwarzschild black hole with quadrupole-order effects

This paper models the general relativistic interaction between a small hyperelastic sphere and a Schwarzschild black hole using an independent finite element scheme, revealing that quadrupole-order effects lead to significant orbital energy loss, spin changes, and the eventual capture of the body into a highly eccentric orbit.

Nishita Jadoo, J. David Brown, Charles R. Evans2026-03-31

⚛️ high-energy theory

IR/UV mixing from higher-order interactions in a Scalar Field

This paper proposes a proof-of-principle mechanism for resolving the cosmological constant problem by introducing a momentum-dependent non-linear interaction in a 4D scalar field theory that breaks translational invariance, thereby generating a dynamically lowered UV cutoff for the Universe while preserving the Planck-scale cutoff required for local particle physics experiments.

Satish Ramakrishna2026-03-31

⚛️ general relativity

Measurement-Induced Perturbations of Hausdorff Dimension in Quantum Paths

This paper presents a more realistic formulation of Abbott et al.'s analysis by demonstrating that sequential quantum measurements, modeled via Gaussian wave packets, fundamentally alter the fractal geometry of particle paths by shifting the Hausdorff dimension, with nonselective evolution reducing roughness and selective evolution requiring feedback control to stabilize trajectories.

You-Wei Ding, Yen Chin Ong, Hao Xu2026-03-31

⚛️ general relativity

Does relativistic motion really freeze initially maximal entanglement?

This paper demonstrates that, contrary to the conventional belief that acceleration universally degrades quantum entanglement, the $1-3$ bipartite entanglement of a four-qubit cluster state remains strictly maximal under all relativistic accelerations, revealing a novel phenomenon of complete entanglement freezing.

Si-Han Li, Hui-Chen Yang, Rui-Yang Xu, Shu-Min Wu2026-03-31

⚛️ general relativity

Impact of Rastall gravity on hydrostatic mass of galaxy clusters

This study demonstrates that Rastall gravity offers a viable phenomenological framework for mitigating the hydrostatic mass bias in galaxy clusters by effectively aligning hydrostatic mass estimates with observed baryonic or lensing masses, although it does not universally outperform other modified gravity models under standard statistical criteria.

M. Lawrence Pattersons, Feri Apryandi, Freddy P. Zen2026-03-31

⚛️ general relativity

The stealth Kerr solution in the bumblebee gravity

This paper presents a Kerr black hole solution with a nontrivial vector field in bumblebee gravity, demonstrating that this solution can be derived from a spherical counterpart using the Newman-Janis algorithm, thereby providing a rare example of the algorithm's validity beyond general relativity.

Rui Xu, Zhan-Feng Mai, Dicong Liang2026-03-31

⚛️ general relativity

Non-minimally Coupled Running Curvaton for DESI-preferred Dynamical Dark Energy and Hubble Tension

This paper proposes a non-minimally coupled running curvaton model that successfully accommodates DESI's preference for dynamical dark energy with phantom crossing while preserving early-universe predictions and potentially alleviating the Hubble tension.

Bichu Li, Lei-Hua Liu2026-03-31

⚛️ general relativity

FLRW-Cosmology in Scalar-Vector-Tensor Theories of Gravity

This paper extends a previous theorem to demonstrate that in generic scalar-vector-tensor theories of gravity, the metric field equations on FLRW spacetimes universally reduce to the Einstein equations with an effective perfect-fluid source, regardless of the specific theory's complexity, while the cosmological dynamics remain determined by the accompanying scalar and vector field equations.

Metin Gürses, Yaghoub Heydarzade2026-03-31

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