2489 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 horizonless, regular ultra-compact object model arising from non-minimal curvature-fluid coupling that mimics black hole phenomenology with a Schwarzschild exterior and a vacuum-like interior, naturally selecting a specific mass-radius window while predicting a unique shell temperature and mass-independent luminosity.
Using the curl-mode CMB lensing power spectrum from the Atacama Cosmology Telescope DR6 data, the study establishes the tightest constraints to date on cosmic string tension and inter-commutation probability, improving previous limits by nearly an order of magnitude.
This paper extends force-free magnetosphere studies to rotating Kerr black holes by explicitly constructing the electromagnetic field and its backreaction on spacetime via linearized Einstein equations, revealing significant modifications to accretion disk observables and jet-launching mechanisms.
By correcting a systematic underestimation of supernova brightness in high-mass calibration galaxies through a revised extinction model that adopts a Milky Way-like distribution, this study lowers the derived Hubble constant to km/s/Mpc, thereby reducing the Hubble tension from to .
This paper reviews and extends the conservation laws and dynamical equations of relativistic magnetohydrodynamics in an expanding, radiation-dominated early Universe, presenting new results on conformal invariance, scaling behaviors, transport coefficients, and wave propagation while adapting the Boris correction for relativistic Alfvén speeds.
This paper computes the dynamical Love numbers of Schwarzschild black holes by matching a point-particle effective field theory, which includes gravitational interactions via the Born series and dimensional regularization, to perturbative solutions of the Regge-Wheeler and Zerilli equations in general relativity, thereby determining both the known logarithmic running and finite scheme-dependent contributions to the tidal response.
This paper demonstrates that the background instability of quintessence models can be comprehensively understood through the lens of entropy by showing that a rapid increase in matter entropy, driven by the distance conjecture, violates the covariant entropy bound and implies the existence of a finite event horizon that conflicts with the trans-Planckian censorship bound, while also linking scale separation to the AdS distance conjecture.
This paper demonstrates that in unimodular gravity, traversable wormholes are impossible to support with ordinary matter because the theory's preservation of standard null focusing properties necessitates a violation of the null energy condition.
This paper revisits the variational principle for relativistic perfect fluids using a manifestly covariant differential forms formalism to clarify boundary conditions for timelike flows and demonstrates that extending this principle to null flows dynamically forces the enthalpy density to vanish, resulting in a stress-energy tensor composed of variable vacuum energy and null dust.
This paper demonstrates that a computationally efficient mode-by-mode filtering method incorporating higher-order gravitational wave modes significantly improves low-latency parameter estimation for neutron star-black hole mergers, thereby enhancing the precision of electromagnetic follow-up strategies and host-galaxy associations.