3949 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 refutes the claim that classical gravity can generate entanglement, demonstrating that the previously reported effect was an artifact of incorrectly discarding specific transition amplitudes which, when properly included, ensure that an initially unentangled state remains factorized.
This paper develops linear perturbation theory for general Bianchi spacetimes in the Newtonian gauge, deriving equations for scalar and tensor modes—including a Bianchi-specific Mukhanov-Sasaki equation and modified Friedmann equations—to facilitate the comparison of anisotropic cosmological models with observational data like the CMB.
This paper demonstrates that while potential-driven early dark energy scenarios can be realized in gravity to alleviate the Hubble tension, they are generally excluded by stringent equivalence principle constraints, implying that nonperturbative effects or nontrivial mechanisms are necessary to reconcile such models with local gravity tests.
This paper proposes an asymmetrical two-brane model where the Higgs vacuum expectation value varies between branes, resulting in superheavy fermions on a second, observer-free brane that could constitute a component of dark matter and generate ultra-high-energy particles through inter-brane photon interactions.
This paper establishes that the universal time evolution of holographic complexity—characterized by a slope-ramp-plateau structure with linear growth and late-time saturation—is fundamentally driven by random matrix universality and a specific pole structure in the generating functions, which are proven to be necessary and sufficient conditions for these behaviors via the residue theorem.
This paper extends the dynamical systems toolkit for multiscalar dark energy by introducing new variables that disentangle kinetic couplings, enabling a systematic stability analysis that reveals genuinely non-geodesic attractors in exponential models while correcting previous misconceptions about non-geodesic fixed points in shift-symmetric scenarios.
This paper investigates the viability of teleparallel gravity models by deriving and analyzing the equations of motion for gauge-invariant cosmological perturbations to assess their stability and physical implications beyond background-level studies.
This paper establishes a covariant differential-form framework for defining non-closed scalar charges in four-dimensional Einstein-scalar-Gauss-Bonnet gravity, revealing a bulk obstruction that vanishes under shift-symmetry and providing a unified geometric interpretation of spontaneous scalarization and black hole thermodynamics through the Smarr formula.
This paper demonstrates that distinguishing between neutron stars and black holes in compact binary populations using only gravitational wave tidal measurements will require hundreds of events, a threshold unlikely to be met by current advanced detectors but achievable with next-generation facilities like the Cosmic Explorer and Einstein Telescope.
This paper presents asymmetric, regular, and asymptotically flat rotating wormhole solutions in Einstein-Dirac-Maxwell theory, supported by a complex non-phantom spinor field and electromagnetic fields, which connect two identical Minkowski spacetimes with potentially different masses and global charges while being fully determined by the throat parameter, spinor frequency, and electromagnetic coupling constant.