⚛️ Category

gr-qc

3875 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

Shadow, acoustic redshift, and transfer observables of Lorentz-violating rotating acoustic black holes

This paper develops a comprehensive transfer analysis for rotating acoustic black holes with Lorentz symmetry violation in (2+1) dimensions, deriving key observables such as acoustic shadows, redshift asymmetries, and flux imbalances to demonstrate how the Lorentz-breaking parameter and rotation jointly influence the capture interval and intensity maps of thin rings and extended disks.

Fernando M. Belchior, Edilberto O. Silva2026-05-28
⚛️ general relativity

Dynamical Resolution of the Cosmic Coincidence Problem in Non-Interacting Holographic Dark Energy via Einstein-Cartan Torsion

This paper demonstrates that Einstein-Cartan torsion provides a geometric mechanism to dynamically resolve the cosmic coincidence problem in non-interacting holographic dark energy by enabling a viable density ratio and cosmic acceleration without requiring phenomenological dark sector interactions or fine-tuning.

Yongjun Yun, Kyungduk Kim, Jungjai Lee2026-05-28
⚛️ high-energy theory

The effective gravitational action of a massless chiral fermion and the absence of parity-odd contributions

Using the BPHZL renormalization scheme, the paper proves that the renormalized gravitational effective action for a massless chiral fermion up to fourth order in graviton fields contains no parity-odd contributions, is equivalent to half the action of a non-chiral Dirac fermion modulo parity-even counterterms, and yields a purely parity-even Weyl anomaly equal to half that of a Dirac fermion.

J. Anero, Carmelo P. Martin2026-05-28
⚛️ high-energy theory

Fermionic Bubble Loop in Cosmological Collider Revisited: Exact signals from spectral and Mellin-Barnes methods

This paper presents an exact analytical calculation of fermionic bubble loop contributions to cosmological collider signals using parallel spectral and Mellin-Barnes methods, revealing that Yukawa interactions with the inflaton yield a vanishing bispectrum due to a field redefinition of tree-level counterparts.

Shuntaro Aoki, Zhehan Qin, Masahide Yamaguchi, Yuhang Zhu2026-05-28
⚛️ general relativity

On the existence and properties of solutions of the generalized Jang equation with respect to asymptotically anti-de Sitter initial data

This paper provides a rigorous analysis of the generalized Jang equation for asymptotically anti-de Sitter initial data sets in dimensions 3≤n≤73 \leq n \leq 7, establishing the existence and properties of solutions under general asymptotic conditions and discussing their potential applications to spacetime positive mass theorems.

Benjamin Meco2026-05-27
⚛️ high-energy theory

Quark-Antiquark Potential as a Probe for Holographic Phase Transitions

This paper investigates whether the holographic quark-antiquark potential can detect a higher-order phase transition between planar charged Reissner-Nordström-AdS and hairy black holes, concluding that while the potential values coincide at the transition point, one phase consistently dominates the other, a behavior also observed in higher-dimensional probes like holographic entanglement entropy.

Andrés Anabalón, Mariano Chernicoff, Gaston Giribet, Julio Oliva, Martín Reyes2026-05-27