3884 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 Clifton-Ellis-Tavakol gravitational entropy proposal to Petrov type I spacetimes by analyzing the effective energy-momentum tensors derived from the Bel-Robinson tensor's algebraic decomposition, specifically applying these findings to the Szekeres class II models.
This paper investigates a modified gravity model involving a scalar field and demonstrates that while specific rotating cosmological solutions are valid in general relativity, they become inconsistent within this extended framework, thereby ruling out the existence of closed timelike curves in these particular spacetimes.
This paper investigates a generalized entropic cosmology based on Kaniadakis statistics, demonstrating how its modifications to horizon entropy and Friedmann dynamics alter Starobinsky inflation and primordial gravitational wave spectra, thereby deriving stringent observational constraints on the Kaniadakis parameter using Planck and BICEP/Keck data.
This paper proposes that modifying the canonical anticommutation relations for fermions near a black hole's event horizon introduces an ad hoc source term in the Dirac equation, yielding stationary solutions that describe a fermion condensate in that region.
This paper proposes a testable, Halilsoy-inspired extension to the standard Newtonian lunar tidal model that introduces an alpha-dependent off-diagonal residual component, which rotates the tidal eigenframe and generates a distinct 45-degree cross-tidal signature absent in the classical diagonal tensor description.
This paper demonstrates that the uniform motion of a Glauber photodetector induces a Doppler shift that, when combined with finite bandwidth, converts the propagation direction of single photons into a detection bias, thereby enabling velocity-controlled directional readout that transitions from phase-sensitive to direction-sensitive measurement without decohering the photon.
The paper proposes an exact, finite kinematic sector of holography defined on a CFT over an open solid torus in the Weyl frame, which establishes bulk-boundary pairs without requiring standard approximations like large- or strong coupling and provides a replica-free definition of entanglement entropy.
This paper demonstrates that right-handed neutrino loops, interacting with the inflaton via a dimension-5 operator that induces an effective chemical potential, can significantly enhance cosmological collider signatures by softening heavy-mass suppression and amplifying oscillatory non-Gaussianities in the primordial three-point correlator.
This paper proposes that the irreducible mass tail of primordial black hole formation, predicted by general relativity, smooths the reheating process and suppresses the associated gravitational wave signal, thereby reopening the possibility that the hot Big Bang originated from the evaporation of ultra-light primordial black holes.
This paper demonstrates that within Jordan-Brans-Dicke theory, the Emergent Universe scenario can achieve robust stability against both classical perturbations and semiclassical quantum tunneling decay for specific choices of the potential and model parameters, thereby potentially avoiding the instability previously identified by Mithani and Vilenkin.