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 establishes a universal Lagrangian identity for Nambu-Goto -branes and demonstrates its application in gravity, revealing that the proper mass of cosmic string loops and closed -branes can evolve over cosmological timescales, a phenomenon absent in standard general relativity.
This paper proposes that incorporating gravitational backreaction into holographic models requires approximate quantum error correction rather than exact codes, introducing a new entropy decomposition where "proto-area" emerges from tripartite non-local magic in the encoding map, thereby establishing a state-dependent link between bulk matter entropy and boundary geometry.
This paper analytically derives a scaling law for the long-term gravitational wave dephasing caused by a first-order QCD phase transition in a neutron star orbiting a Kerr black hole, demonstrating how the black hole's spin and the transition velocity amplify this effect to probe the high-density QCD equation of state.
This review outlines the current state of Pulsar Timing Array research following the detection of a nanoHertz gravitational wave background, detailing the physics of detection, resolving tensions in astrophysical models, exploring multi-messenger searches and new physics probes, and charting the field's future trajectory with next-generation observatories.
This paper proposes that non-singular bounce cosmologies produce a distinctive oscillatory pattern in the relic gravitational wave spectrum, caused by interference between two peaks in the effective potential during the contraction phase, offering a testable "smoking-gun" signature for future gravitational wave observatories to distinguish bounce scenarios from inflation.
This paper demonstrates that in multi-field scalar-tensor theories, the interaction between a dilaton and an axion can achieve robust screening of cosmologically light scalars through a "BBQ mechanism" that cancels exterior gradients, thereby decoupling the thin-shell localization effect from force suppression and reopening viable parameter space for strongly coupled dilatons that evade single-field no-go arguments.
This paper establishes a general existence theorem for null Force-Free Electrodynamics solutions by proving that any null geodesic congruence admits a transverse basis rotation satisfying the equipartition condition and that shear-free congruences guarantee the existence of field sheet foliations, thereby providing a coordinate-independent geometric criterion for such solutions illustrated through explicit examples in various spacetimes.
CETOmega is a unified, four-dimensional framework that reconciles general relativity and quantum mechanics by deriving gravity from a causal-informational principle, where a scalar "texon" field emerging from a discrete causal network simultaneously explains dark matter and dark energy while ensuring unitarity and consistency with cosmological observations.
This paper investigates the dynamics of massive particles and associated gravitational waveforms in Einstein-Bumblebee gravity, demonstrating that while the uncharged black hole's effective potential mimics the Schwarzschild case, the distinct structure of periodic orbits and their unique phase-shifting gravitational wave signatures offer a viable method to detect Lorentz symmetry breaking via future space-based observatories.
This paper investigates anisotropic Bianchi type I cosmologies within nonlocal RT gravity and reveals that, contrary to the cosmic no-hair theorem and most other models, the theory predicts a growth of cosmic anisotropy rather than its decay.