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.
Particle cosmology integrates the physics of fundamental particles with the study of the cosmos, utilizing the early Universe as a high-energy laboratory and cosmological observations to test theoretical frameworks like inflation, baryogenesis, and Dark Matter.
This paper demonstrates that the space-like singularities appearing in certain time-dependent backgrounds of two-dimensional string theory are artifacts of the strict double scaling limit, as a full matrix model treatment with non-linear terms reveals that the system undergoes a quantum quench leading to a stable, power-law relaxation to a time-independent equilibrium state rather than a true singularity.
This paper serves as a comprehensive primer and reference guide that consolidates the essential group theory tools, conventions, and formulae of SU(2) and SL(2,C) required for Loop Quantum Gravity and spin-foam calculations, aiming to bridge the gap between physicists and mathematicians.
This paper proves the stability of M. Anderson's proposed "double-cusp" cosmological spacetime, which models two hyperbolic manifolds separating via a thin torus neck, under small symmetry-preserving perturbations by establishing the stability of a geodesic segment as a wave map into the hyperbolic plane and demonstrating future long-time existence for the associated wave map equations.
This study demonstrates that isolated binary evolution, particularly through the stable mass transfer channel with mass-ratio reversal, naturally reproduces the observed positive bias in effective spin and the anti-correlation between effective spin and mass ratio in binary black hole mergers.
This paper provides a concrete and computable realization of the ER=EPR conjecture by deriving the Einstein-Rosen bridge from quantum entanglement in the thermofield double CFT, explicitly identifying the wormhole's Bekenstein-Hawking entropy as entanglement entropy and quantitatively verifying Van Raamsdonk's conjecture on spacetime emergence.
This paper demonstrates that the XOB method and an inner-structure modulated quadrupole formula accurately reproduce post-Newtonian dynamics and numerical relativity waveforms for black hole mergers, providing evidence that black holes possess the inner structures proposed by the authors' complementarity of gravitational collapse theory.
This paper proposes that the inner structure of black holes formed via gravitational collapse is described by two complementary frameworks—collapsars in Schwarzschild time and oscillatory solid-balls in Lemaître time—and uses this duality to derive the Bekenstein-Hawking area law by directly counting the degeneracy of the collapsing material's wave functional.
This study compares single-parameter and multi-parameter analyses of gravitational wave data to constrain parity and Lorentz violations, finding that single-parameter tests remain robust for current and future observations despite potential parameter degeneracies in specific multi-parameter models.
This paper presents a new analytic solution to the Einstein-Dirac equations describing a pair of gravitationally interacting neutral fermions that, despite having arbitrarily large constituent mass, forms a gravitationally undetectable object with zero ADM mass and a naked spacetime singularity.