⚛️ Category

gr-qc

3919 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

Inflationary Scenarios in f(Q,ϕ)f(Q,\phi) Gravity with Scalar Field Coupling

This paper investigates inflationary scenarios in modified f(Q,ϕ)f(Q,\phi) gravity with nonminimal scalar coupling, demonstrating that while De Sitter inflation requires a tightly constrained coupling parameter (ξ∼10−3\xi \sim 10^{-3}) to match Planck data, the Cosh-type model offers a robust and observationally consistent description of inflation with predicted spectral index and tensor-to-scalar ratio values in excellent agreement with current constraints.

F. Mavoa, M. B. Barry, R. Ndioukane, M. G. Ganiou, F. K. Ahloui2026-04-30
⚛️ general relativity

Trapping, Irregular Waveforms, and Efficient Radiation in Ultra-relativistic Black Hole Encounters

Using numerical relativity, this study demonstrates that ultra-relativistic black hole encounters at high Lorentz factors (γ≈5.1\gamma \approx 5.1) enter a new regime characterized by prolonged, irregular gravitational wave emission and horizon absorption driven by transient null trapping, resulting in the radiation of over 65% of the system's initial energy.

Hengrui Zhu, Frans Pretorius, James M. Stone2026-04-30
🔢 mathematics

Algebraic quantum kinematics and SR-selection

This paper establishes the first part of a six-paper series presenting an operator-algebraic framework that derives special relativity from non-relativistic quantum mechanics by analyzing the photon sector of free QED, distinguishing the roles of constants cc and ℏ\hbar, and proposing the "SR-selection conjecture" which posits that the transition to a relativistic Haag-Kastler net is structurally obstructed in the Galilean case.

Leonardo A. Pachon2026-04-30
🔢 mathematics

Newton-Cartan limit of Klein-Gordon AQFT and the collapse of Galilean modular structure

This paper extends the known absence of Reeh-Schlieder and Tomita-Takesaki modular flow in Galilean algebraic quantum field theory to curved Newton-Cartan backgrounds by demonstrating that the c→∞c \to \infty limit of the free Klein-Gordon field yields a Galilean net where the gravitational potential influences the Hamiltonian but fails to restore the modular structure obstructed by the Bargmann central charge.

Leonardo A. Pachon2026-04-30
⚛️ high-energy experiments

Normalizing flows for density estimation in multi-detector gravitational-wave searches

This paper demonstrates that replacing PyCBC's traditional binned histogram-based density estimators with normalizing flows significantly reduces storage requirements by over three orders of magnitude while maintaining or improving the sensitivity of multi-detector gravitational-wave searches, thereby enabling scalable analysis for future detector networks.

Sam Insley, Michael J. Williams, Rahul Dhurkunde, Ian Harry2026-04-30
⚛️ general relativity

Thermodynamic properties of the Kerr Black-hole in non-linear electrodynamics with cosmological constant

This paper investigates the thermodynamic properties and horizon structure of a slowly rotating, magnetically charged Kerr black hole within nonlinear electrodynamics and a cosmological constant, demonstrating that these factors significantly modify the black hole's mass profile, horizon configurations, and key thermodynamic parameters such as temperature, angular velocity, and entropy.

Vinayak S. Pawar, Siba Prasad Das2026-04-30
⚛️ general relativity

Nonlinear Relativistic Effects on Cosmological Redshift Drift

This article presents the first fully gauge-invariant, relativistic calculation of the second-order cosmological redshift drift using light-cone coordinates, according to which the distortion in redshift space is a second-order effect, and shows that the nonlinearities in the bispectrum are significantly enhanced compared to the squared power spectrum at low redshifts and large momenta.

Pierre Béchaz, Giuseppe Fanizza, Giovanni Marozzi, Matheus R. Medeiros Silva2026-04-30