2489 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.
The paper proposes an exact, finite kinematic sector of holography defined on a CFT over an open solid torus in the Weyl frame, which establishes bulk-boundary pairs without requiring standard approximations like large- or strong coupling and provides a replica-free definition of entanglement entropy.
This paper demonstrates that right-handed neutrino loops, interacting with the inflaton via a dimension-5 operator that induces an effective chemical potential, can significantly enhance cosmological collider signatures by softening heavy-mass suppression and amplifying oscillatory non-Gaussianities in the primordial three-point correlator.
This paper proposes that the irreducible mass tail of primordial black hole formation, predicted by general relativity, smooths the reheating process and suppresses the associated gravitational wave signal, thereby reopening the possibility that the hot Big Bang originated from the evaporation of ultra-light primordial black holes.
This paper demonstrates that within Jordan-Brans-Dicke theory, the Emergent Universe scenario can achieve robust stability against both classical perturbations and semiclassical quantum tunneling decay for specific choices of the potential and model parameters, thereby potentially avoiding the instability previously identified by Mithani and Vilenkin.
This paper demonstrates that within quasi-topological gravity, stable neutron stars can be more compact than black holes, offering potential observational signatures like gravitational-wave echoes to test strong-field gravity beyond General Relativity.
This paper establishes quantitative estimates for systems of wave equations on asymptotically de Sitter vacuum spacetimes in even spatial dimensions, serving as a crucial component for proving a definitive nonlinear scattering theory for the Einstein vacuum equations.
This paper investigates how a harmonically trapped detector responds to classical versus non-classical gravitational fields, demonstrating that while coherent states can be mimicked by stationary classical fields, squeezed states induce unique non-linear time dependencies in transition probabilities due to correlation functions that cannot be replicated classically.
This paper establishes a holographic correspondence between bulk gravitational radiation in asymptotically locally anti-de Sitter spacetimes and dissipative fluid dynamics in the dual boundary theory, extending this framework to the flat limit to reveal how bulk radiation sources Carrollian viscous stress and heat currents in flat-space holography.
This paper utilizes the Fisher matrix formalism to demonstrate that next-generation gravitational wave detectors, such as Cosmic Explorer and the Einstein Telescope, will be capable of distinguishing primordial black holes from exotic compact objects and neutron stars by detecting sub-solar masses out to redshifts of and tidal effects up to .
This paper demonstrates that for dynamical black holes in theories, the Hollands-Wald-Zhang entropy equals the Wald entropy on the generalized apparent horizon, and establishes that only the apparent horizon prescription correctly reproduces this entropy via the replica method while satisfying the physical process first law and a reformulated generalized second law.