2558 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 Ricci-Gauss-Bonnet dark energy model within Hořava-Lifshitz cosmology, demonstrating through scalar-field reconstruction that it yields a stable, cosmological-constant-like late-time acceleration while satisfying the generalized second law of thermodynamics.
This paper reformulates classical General Relativity as a non-conservative, action-dependent field theory by demonstrating that the Hilbert action's dynamics can be expressed through conformal spacetime geometry coupled with a dissipative sector, where gravitational backreaction arises from non-conservative interactions between the action and geometric degrees of freedom.
This paper compares effective quantum gravity and trace anomaly approaches to calculating quantum corrections to the Newtonian potential in the Boulware vacuum, finding that they yield different results unless the asymptotic behavior of the energy-momentum tensor is modified to reconcile the two methods.
This paper demonstrates that applying the Page-Wootters relational formalism to a plane-symmetric Bianchi type-I universe within the Wheeler-DeWitt framework resolves the classical big bang singularity by yielding a conditional probability density that vanishes at zero volume, thereby establishing a consistent, nonsingular quantum description of cosmological dynamics.
This paper employs dynamical systems analysis to demonstrate that a non-canonical generalised Brans-Dicke theory with non-minimal coupling can reproduce CDM background characteristics for constant, power-law, and exponential potentials, while exhibiting distinct dynamical behaviors compared to other scalar-tensor models.
This work demonstrates that employing a fully covariant formalism to account for previously overlooked gauge dependencies reveals that the formation of primordial black holes and scalar-induced gravitational waves from first-order phase transitions is strongly suppressed, thereby calling into question their suitability as an explanation for the recent signals from pulsar timing arrays.
This paper presents a hierarchical Bayesian inference framework that utilizes a neural network emulator to accelerate detectability calculations by over six orders of magnitude, enabling robust constraints on extreme mass-ratio inspiral population parameters and massive black hole evolution using future LISA data.
This paper introduces a physical field-vanishing boundary condition for Reissner-Nordström-AdS black holes that enforces the vanishing of both metric and electromagnetic field-strength perturbations at the AdS boundary, leading to the derivation of specific Dirichlet and Robin conditions for master functions and the identification of new spectral features in quasinormal modes.
This paper establishes an identification between the phase space of the soft sector in four-dimensional asymptotically flat gravity and that of a spherically symmetric finite causal diamond in Minkowski spacetime, demonstrating that the leading soft graviton mode corresponds to the radial fluctuation of the diamond's size while the Goldstone mode encompasses both this fluctuation and its symplectic partner.
This paper demonstrates that the proposed Lunar Gravitational-Wave Antenna (LGWA) would significantly advance gravitational-wave astronomy by detecting a substantial fraction of known binary black hole events, enabling systematic multiband observations with ground-based detectors, and providing precise parameter estimation and early warnings for intermediate-mass binaries like GW231123.