⚛️ 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

Dynamics and observational signatures of warm Dirac-Born-Infeld inflation with nonminimal derivative coupling

This paper proposes and analyzes a warm Dirac-Born-Infeld inflation model with nonminimal derivative coupling to gravity, demonstrating that the synergistic effects of thermal dissipation and enhanced gravitational friction successfully constrain the model's parameters to match Planck 2018 observations while suppressing the tensor-to-scalar ratio and resolving the η\eta problem without requiring super-Planckian field excursions.

Run-Qing Zhao, Xiao-Min Zhang, Peng-Cheng Chu, Yun-Cai Feng2026-07-14
⚛️ high-energy theory

Holographic Timelike Entanglement and Subregion Complexity in Localized AdS3*S3*T4 Black Holes

This paper investigates timelike entanglement entropy and subregion complexity in localized AdS3×_3 \times S3×^3 \times T4^4 black holes, demonstrating that these Lorentzian observables reveal unique geometric features of the black-pole solution—such as non-monotonic temporal families and internal sphere dependence—that are absent in standard BTZ black holes and large-rr approximations.

Jitendra Pal, Yu Shi2026-07-14
⚛️ general relativity

Is there ghost and tachyon free bounce in UV complete gravity theory?

This paper analyzes analytic infinite derivative gravity to demonstrate that achieving a ghost- and tachyon-free cosmological bounce generally requires a negative cosmological constant, as known solutions typically exhibit ghost radiation, while also computing the resulting tensor mode spectrum and its implications for Cosmic Microwave Background observations.

Hao Hu, Alexey S. Koshelev, Abhishek Naskar2026-07-14
⚛️ general relativity

Universal Bounds on Black Hole Observables Imposed by Energy Conditions

This paper establishes universal, testable bounds on observable black hole properties—such as shadow size and photon-ring time delay—derived from classical energy conditions at the photon sphere, providing a model-independent method to probe strong-field gravity and distinguish between violations of General Relativity and the energy conditions themselves.

Rahul Kumar Walia, Boris Georgiev, Chi-kwan Chan2026-07-14
⚛️ general relativity

On constraining the initial orbital eccentricity of inspiral-dominated gravitational-wave events with TaylorF2Ecck

This paper introduces the TaylorF2Ecck approximant to analyze inspiral-dominated gravitational-wave events like GW170817 and GW190425, finding that their initial orbital eccentricities are negligible and providing no strong evidence for periastron advance or eccentricity over quasi-circular models, while highlighting the necessity of including eccentricity contributions up to at least 3.5PN order for accurate modeling.

Hemantakumar Phurailatpam, Gopakumar Achamveedu, Maria Haney, Tjonnie Li, Srishti Tiwari2026-07-13
⚛️ general relativity

Geometric Constraints on Quantum Gravity-Inspired Dispersion Relations

This paper employs a geometric framework analyzing the intrinsic curvature of energy-momentum surfaces to demonstrate that Modified Dispersion Relations derived from Loop Quantum Gravity remain strictly hyperbolic and stable across all phenomenologically relevant regimes, while also providing universal stability constraints for non-polynomial relations from other quantum gravity approaches.

Gines R. Perez Teruel2026-07-13