3949 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 proposes a fluid-based analogue gravity setup using surface-gravity waves to experimentally emulate the instabilities of regular black holes and horizonless mimickers, concluding that while theoretically feasible, alternative media like Bose-Einstein condensates may be more practical for capturing these specific physical features.
This paper demonstrates that while unrestricted generalized Vaidya exteriors in metric gravity leave the Oppenheimer-Snyder collapse problem formally open, imposing physically realistic matter constraints forces the exterior solution into highly restricted branches that either lack global asymptotic validity or reduce the interior to a constant-curvature sector, thereby failing to resolve the collapse of dust.
This paper refutes claims that quantum damping of cosmological shear in modified loop quantum cosmology is non-generic by demonstrating that previous counterexamples relied on unphysical initial conditions, and establishes that for physically admissible three-dimensional contracting universes, shear damping is a robust feature leading to an isotropic attractor and classicalization.
This paper demonstrates that applying a Generalized Uncertainty Principle with both minimal length and maximal momentum to Schwarzschild black holes results in a finite, discrete mass spectrum with a strict upper bound and regulated thermodynamics, thereby using observations of supermassive black holes to constrain the GUP parameter to .
This paper develops a simplified relativistic kinetic theory for gases with internal degrees of freedom using a BGK-type collision term to derive first-order thermal coefficients via the Chapman-Enskog expansion and construct a self-consistent Einstein-Boltzmann system for spatially homogeneous models with viscosity and heat flow.
This paper investigates the solar production of symmetrons via photon conversion in the tachocline and their subsequent absorption in underground liquid xenon detectors, establishing new astrophysical bounds based on solar luminosity limits and deriving complementary direct-detection constraints using XENONnT data to probe previously uncharted regions of symmetron parameter space.
This paper presents the first calculation of gravitational-wave memory from binary black hole mergers in scalar-Gauss-Bonnet gravity, revealing that while direct scalar contributions are suppressed, indirect modifications to merger dynamics alter memory amplitudes by a few percent and significantly enhance the detectability of deviations from general relativity when memory is included in third-generation detector analyses.
This paper investigates whether higher-derivative terms in projectable Hořava gravity can stabilize its infrared instability by evolving into static, inhomogeneous solutions, but concludes that no such static endpoints exist, thereby reinforcing the necessity of time-dependent mechanisms like cosmic expansion to conceal the instability.
This paper computes the quantum radiation emitted by relativistic single-electron wavepackets, demonstrating that while radiation vanishes for electrons at rest, uniformly accelerated electrons exhibit secularly growing power with a classical interpretation, and that proposed experimental signatures of the Unruh effect in specific "blind spots" are dominated by transverse deviation correlators rather than the Unruh effect itself.
This paper derives the total even-in-velocity scattering observables at fifth post-Newtonian order using a worldline action and Feynman's prescription to establish a universal conservative Hamiltonian and resolve ambiguities in Effective One Body coefficients, while demonstrating the superiority of this approach over the prescription in preserving expected theoretical structures.