3256 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 establishes a general, gauge-invariant framework within the covariant phase space formalism for deriving the first law of black hole mechanics in generic diffeomorphism-invariant theories, specifically addressing dynamical perturbations of charged black objects with non-minimally coupled -form gauge fields and resolving ambiguities in defining electric and magnetic charges and dynamical entropy.
This paper proposes a phenomenological viscous dark energy model where space is treated as an elastic brane supporting longitudinal phonons, demonstrating that its parameters can reproduce DESI DR1, Pantheon+, and Planck 2018 observational constraints with a near-luminal sound speed and an ultralight phonon mass scale.
This paper demonstrates that while a monopole magnetic field does not alter the radial motion of a charged test particle around a static black hole, it drastically constrains tangential motion to a thin cone, suggesting the possibility of hot plasma lumps hovering above the black hole.
This paper numerically analyzes physically acceptable static charged polytropic spheres with a cosmological constant to determine the conditions under which internal trapping of circular geodesics occurs for various particle types, revealing that while neutral null particles are trapped purely by geometry, the trapping of other particles also depends on their intrinsic charge and energy.
This paper phenomenologically derives a cosmological model combining a cosmological constant and a dissipative term via the first law of thermodynamics and effective entropy, demonstrating that such a weakly dissipative universe () successfully explains the transition to cosmic acceleration, satisfies thermodynamic laws, and aligns with observational data and structure formation constraints.
This paper develops a consistent field-based perturbation framework to analyze the impact of oscillating generalised axion-like quintessence fields on cosmic structure growth, demonstrating that the standard effective fluid description fails during this dynamical phase.
This paper proposes a theoretical model of a two-fluid quantum bouncing cosmology where the inclusion of radiation alongside matter in the contracting phase naturally generates an observationally viable red-tilted spectrum of curvature perturbations without requiring fine-tuning.
This paper demonstrates that while certain galactic halo profiles like Dehnen and Einasto can generate regular black-hole geometries under the condition , the widely used Hernquist profile fails to do so, instead resulting in black-hole solutions that retain a central singularity.
This paper demonstrates that in pure 2D JT gravity, non-perturbative corrections arising from negative energy states in the dual random matrix ensemble cause a dramatic breakdown of the semiclassical bulk geometry at parametrically shorter length scales () than previously predicted ().
This paper argues that the sub-solar mass gravitational wave event S251112cm is a viable candidate for a primordial black hole merger, as calculated probabilities under current observational constraints support this non-standard formation channel, thereby highlighting the potential of such events to probe primordial black holes as dark matter.