2599 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.
This paper introduces a data-driven bootstrapping framework to quantify "catalog variance" in gravitational-wave population analyses, demonstrating that accounting for finite catalog size significantly broadens uncertainty estimates and reveals that previously prominent features, such as the primary-mass peak, may be statistical artifacts rather than genuine astrophysical signals.
This paper proposes a Generalized Cosmological Time framework that resolves conflicting time dilation observations by distinguishing between discrete, gravitationally shielded transients (SNe Ia and GRBs) that exhibit geometric path dilation and persistent thermal sources (QSOs) whose signals are masked by intrinsic selection effects.
This paper presents global 3D GRMHD simulations incorporating pair physics to reveal that electron-positron pairs in black hole accretion flows are primarily generated near the disk midplane and transported via advection to the corona and jets, where they can significantly exceed equilibrium values and potentially regulate coronal temperatures.
This paper investigates the classical and quantum cosmological aspects of Extended Geometric Trinity of Gravity using the minisuperspace approach and Noether symmetries, demonstrating how including divergence terms restores equivalence between General Relativity, Teleparallel, and Symmetric Teleparallel formulations while deriving and comparing exact cosmological solutions.
This paper extends the finite-distance Gauss-Bonnet lensing framework to spinning massive particles in static spherically symmetric spacetimes by reformulating the Mathisson-Papapetrou-Dixon dynamics to include a spin-dependent boundary functional, thereby deriving a generalized deflection identity and providing a weak-field recipe to compute leading spin corrections for Schwarzschild, Reissner-Nordström, and Kottler geometries.
This paper analytically proves the black-hole Meissner effect for extremal Kerr--Bertotti--Robinson spacetimes by demonstrating that horizon-threading magnetic flux vanishes in the static limit through exact identities derived from the horizon's double-root structure, a result corroborated by geometric arguments and contrasted with other spacetime families.
This paper establishes novel decoupled energy estimates for tensorial non-linear wave equations by exploiting their specific structure and commutator terms, providing a framework to handle non-linearities from the Einstein-Yang-Mills system and other new structures that are incompatible with the classical Lindblad-Rodnianski -estimate.
This paper proposes a single-field inflation model where the inflaton is the dilaton of a confining gauge theory, deriving a Coleman--Weinberg potential constrained by the trace anomaly that, when coupled non-minimally to gravity, yields a plateau consistent with CMB data while predicting specific, testable deviations in spectral indices driven by the Migdal--Shifman logarithmic structure.
This paper investigates the Casimir effect of a massive, non-minimally coupled scalar field in static, spherically symmetric black hole spacetimes within bumblebee gravity, deriving closed-form expressions for energy and pressure that reveal how Lorentz-violating parameters and proximity to the horizon significantly alter vacuum interactions, including the emergence of repulsive regimes and amplified interior energies in metric-affine scenarios.
This paper investigates the thermodynamic topology and photon sphere characteristics of black holes in a brane-world scenario with fractal Barrow entropy, revealing that while Bekenstein-Hawking entropy shows no phase transitions, Barrow entropy induces heat capacity divergences and a dominant topological charge of $-1$ driven by dark matter, whereas the dS model's cosmological horizon precludes stable photon spheres and specific topological charges.