3919 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 investigates the thermodynamics of Schwarzschild-AdS black holes in non-commutative geometry, demonstrating that the non-commutativity parameter acts as a Planck-scale thermodynamic variable that induces van der Waals-like phase transitions and temperature corrections while preserving the first law of thermodynamics.
This paper constructs a canonical Hamiltonian formulation for a deformed Poisson bracket spacetime derived from the general uncertainty principle applied to gravity, thereby restoring covariance and enabling the study of dynamics through the covariant coupling of scalar matter and dust.
This article proposes that the Euclidean path integral on non-time-orientable elliptic de Sitter spacetime defines a no-boundary density matrix rather than a wave function, as demonstrated by the explicit calculation of entanglement entropies for free Dirac fermions, revealing a unique property in which the global Hilbert space is one-dimensional while the Hilbert spaces of individual observers remain nontrivial.
This contribution resolves the apparent violation of the Landauer principle in squeezed thermal reservoirs by introducing a generalized framework based on an effective Hamiltonian, which derives a strictly non-negative inequality for entropy production and explicitly confirms its validity through the investigation of a moving Unruh-DeWitt detector.
This paper proposes a variational framework for quantizing gravitational fields by extending the stationary action principle with a relative entropy correction, which successfully recovers the Wheeler-DeWitt equation without operator ordering ambiguities and yields a Schrödinger equation for matter fields with specific quantum corrections.
This paper investigates the deflection of light and greybody factors around a BTZ-ModMax black hole in a homogeneous plasma medium, demonstrating how the ModMax nonlinear electrodynamics parameter, cosmological constant, and plasma dispersion collectively alter gravitational lensing signatures and energy emission spectra compared to vacuum and standard charged BTZ cases.
This paper constructs an approximate Fermi normal coordinate system for a boosted cosmic test mass within FLRW spacetime to compare its resulting metric with that of a comoving observer and to analyze the circular gravitomagnetic field generated by the mass's motion.
This paper presents an exact anti-de Sitter black hole solution coupled with a Kalb-Ramond field and nonlinear electrodynamics, analyzing its horizon structure and demonstrating that Lorentz-violating parameters and nonlinear electrodynamics induce rich thermodynamic behaviors, including nonmonotonic temperature profiles, deviations from the area law, and first-order phase transitions.
This paper presents a canonical quantization framework for all minisuperspaces derived from symmetry reductions of the Einstein-Hilbert Lagrangian that satisfy the principle of symmetric criticality, covering a wide range of cosmological and black hole geometries, and solves the resulting Wheeler-DeWitt equation both with and without the imposition of derived conformal symmetries.
This paper employs the Bronnikov-Konoplya-Pappas parametrization to analyze electromagnetic perturbations and quasinormal modes in both isolated and galactic Damour-Solodukhin wormholes, deriving observationally viable metrics constrained by Sgr A* shadow data and revealing that while oscillation frequencies remain stable, damping rates are highly sensitive to galactic compactness.