3202 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 reviews recent advancements in string theory model building for early and late-time cosmology, detailing a class of Kähler modulus-driven inflation models with axionic dark radiation production and presenting a string-theoretic axion hilltop quintessence model while analyzing the challenges of de Sitter vacua versus dynamical dark energy.
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 defends the validity of entanglement-based witnesses for non-classicality by demonstrating that collapse-based models of gravity, such as the Diósi-Penrose model, inherently violate the principle of locality and therefore cannot genuinely generate entanglement through purely local means.
This paper demonstrates that a vector field non-minimally coupled to gravity can exactly reproduce the dynamics of Einstein clusters, suggesting that flat galactic rotation curves may be a manifestation of modified gravity rather than dark matter.
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 proposes constructing monotonic entropy functionals for four-dimensional Lorentzian spacetimes to establish the long-time well-posedness of Ricci flow by demonstrating that the coupled system of Ricci and conjugate heat flows acts as gradient flows, thereby preventing the blow-up of timelike modes through the boundedness of these functionals.