2575 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 develops a unified post-Newtonian framework to compare metric and Palatini formalisms in general scalar-tensor gravity, revealing that while observational constraints are typically model-dependent, the Palatini approach can yield significantly weaker local bounds due to stronger Yukawa suppression and reproduces general-relativistic limits in gravity where the metric formalism does not.
This paper presents the first experimental verification of holographic duality using hyperbolic lattices, demonstrating that classical scalar field measurements in a curved bulk space successfully reproduce the boundary conformal field theory's correlation functions and entanglement entropy as predicted by the Ryu-Takayanagi formula.
This paper demonstrates that the redundancy inherent in Friedmann-Lemaitre-Robertson-Robertson-Walker cosmology arises inevitably from general relativity and dictates a special role for one Friedmann equation in constraining the system's initial conditions.
This paper demonstrates that by constructing nested Rindler wedges displaced along a null direction, one can achieve selective thermalization of specific momentum modes for massless scalar fields and chiral excitations for massless fermions, offering new insights into quantum hair on horizons and potential chiral phenomena in the early universe.
This paper investigates cosmological perturbations in the modified loop quantum cosmology (mLQC-I) model by identifying a stable initial state in the contracting phase using the Birrell-Davies method and deriving first-order approximate solutions for mode functions via the uniform asymptotic approximation method.
This paper estimates that nonlinear gravitational effects in the weakly perturbative regime of a Schwarzschild black hole merger generate a degree of squeezing in gravitational waves of approximately one percent, based on predicted higher harmonic amplitude ratios during the ringdown phase.
This paper establishes a quantum version of asymptotic velocity domination for polarized Gowdy cosmologies by demonstrating that the two-point functions of Dirac observables converge to their simplified velocity-dominated counterparts near the Big Bang, while the full correlators can be reconstructed as a uniformly convergent series of averaged spatial gradients.
This paper presents a framework for detecting merging supermassive black hole binaries in pulsar timing array data using a complete waveform model that unifies inspiral, merger, ringdown, and memory signals, demonstrating successful parameter estimation and sky localization while highlighting the biases introduced by simplified memory burst approximations.
This paper derives the first universal, state-independent lower bounds on semi-local integrals of null energy flux in interacting quantum field theories across two and higher dimensions by leveraging the quantum null energy condition, strong subadditivity of entropies, and vacuum modular Hamiltonians.
This paper presents the first exact, non-singular black hole solution in General Relativity sourced by the phantom branch of a Dirac-Born-Infeld scalar field, which resolves the central singularity via kinetic stiffness and allows primordial black holes to survive evaporation as gram-scale relics, thereby opening a new mass window for dark matter.