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 extends the Landau theory analysis of scalarization phase transitions in neutron stars to include general linear and quadratic couplings and stellar rotation, demonstrating that the former reveals overlooked solution branches while the latter primarily shifts transition masses to higher values without altering the qualitative phase structure.
This study demonstrates that Myrzakulov-type gravity with a Chaplygin gas equation of state can generate a stable, non-singular cosmic bounce driven by negative quadratic trace coupling () that violates the Null Energy Condition through geometric repulsion, thereby offering a viable alternative to the Big Bang singularity while satisfying causality and stability constraints.
This paper proposes a model in 2+1 dimensions where the black hole horizon is composed of quantized elementary lengths, enabling a length ensemble formulation that directly derives the Hawking black body spectrum and its modified temperature for a local observer via the Tolman factor.
This paper investigates how gravitational inhomogeneity affects transport phenomena in a system of massless Dirac fermions coupled to both Maxwell and dark photon fields, revealing that the resulting currents are proportional to beta functions and predicting specific corrections to scale conductivities in both the visible and dark sectors.
This paper proposes and tests a family of phenomenological cosmological models featuring an interacting dark sector modulated by a sparseness scale parameter, demonstrating through phase-space analysis and Bayesian constraints from multiple observational datasets that a nonzero sparseness scale is favored at over 95% confidence, thereby supporting its role in bounding energy exchange and preventing phantom crossing.
This paper demonstrates that a nontrivial sound speed during inflation significantly alters the quantum-information diagnostics of cosmological perturbations by suppressing state purity, amplifying entropic and entanglement measures, and postponing the onset of classicality through modified decoherence dynamics.
This paper demonstrates that accelerating scaling attractors in a two-fluid cosmological system with dark matter particle creation can emerge without dark energy, but only when the energy exchange is driven by dark matter density and flows from dark matter to the second fluid.
This paper demonstrates that a quantum system comprising a harmonic oscillator polynomially coupled to a ghost with negative kinetic energy can be consistently quantized with a well-defined vacuum and manifestly unitary evolution, provided the system possesses an integral of motion with a positive discrete spectrum that ensures stability despite the Hamiltonian's unbounded spectrum.
This study demonstrates that a data-driven parameter estimation framework incorporating broad priors on waveform phase and amplitude uncertainties effectively mitigates systematic errors in LIGO-Virgo O1-O3 binary black hole merger analyses, thereby resolving inconsistencies across different waveform models and data processing methods for key events like GW191109\_010717 and GW200129\_065458.
This paper defines invariant, Carrollian-geometric extended boundaries at timelike and spatial infinity (Ti and Spi) for asymptotically flat spacetimes, demonstrating their utility in characterizing asymptotic symmetries, realizing massive field scattering data, and naturally recovering the BMS and Poincaré groups along with Strominger's matching conditions.