3841 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 demonstrates that warm inflation can naturally produce dark matter by retaining a residual inflaton condensate due to a rapid drop in the dissipative ratio after inflation, which for a quadratic potential with dissipation predicts a dark matter mass of approximately 0.02 MeV consistent with current cosmological constraints.
This dissertation proposes a Fractional Holographic Dark Energy (FHDE) framework by integrating Riesz fractional derivatives into black hole thermodynamics to derive a corrected entropy, which is then used to construct a new dark energy model that addresses Hubble cutoff challenges and explains late-time cosmic acceleration across various gravitational theories.
This study numerically demonstrates that Bondi-Hoyle-Lyttleton accretion onto Kerr-Sen black holes generates shock-cone oscillations with mass-scaled QPO frequencies and harmonic ratios (3:2, 2:1) that unify timing signatures across stellar-mass to supermassive black holes, offering a potential framework to distinguish Kerr-Sen geometry from standard Kerr spacetime and constrain source parameters.
This paper constructs a novel central-charge Rényi entropy for thermal CFTs on a hyperbolic cylinder that satisfies fundamental entropy inequalities, revealing a characteristic index that separates the theory space into distinct statistical regimes governed by dominant CFT realizations versus fluctuating theories with higher-energy modular excitations.
This paper proposes that quantum-gravitational D-foam effects, which suppress pair creation in atmospheric electromagnetic cascades, could lead to an underestimation of primary cosmic-ray energy and a relative enhancement of muon content, potentially offering a theoretical explanation for the long-standing "muon puzzle" observed by the Auger and Telescope Array collaborations.
This paper reports on the BART experiment, which uses a particle accelerator to directly test the hypothesis that low-energy electron emission is a key mechanism influencing test mass charging in the LISA Gravitational Reference Sensor by measuring proton-induced charging as a function of electrostatic potential.
This paper investigates the polarization states and effective stress-energy tensor of gravitational waves in metric gravity, demonstrating that the theory's additional scalar degree of freedom introduces breathing and longitudinal modes alongside standard tensor modes, while the massive scalar field's subluminal propagation leads to frequency-dependent suppression of energy transport.
This paper proposes a post-inflationary mechanism where primordial magnetic fields generate vector perturbations during a kination epoch, which nonlinearly source enhanced scalar curvature perturbations scaling as to produce primordial black holes that could constitute a significant fraction of dark matter.
This paper investigates future-pointing timelike solutions of the Lorentz force equation in sub-extremal Kerr–Newman spacetime, demonstrating the existence of closed and broken electromagnetic orbits within the time-machine region that facilitate energy extraction and causality-violating processes for charged particles.
This paper develops a unified Thermo Field Dynamics framework for massive scalar fields in de Sitter spacetime that integrates geometric horizon doubling with statistical thermal effects, revealing how observer-dependent perspectives (comoving vs. static) lead to distinct particle creation mechanisms and a characteristic thermal scale driven by the interplay of geometric and intrinsic temperatures.