2615 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 resolves the issue of general covariance in spherically symmetric effective quantum gravity by deriving necessary conditions for the effective Hamiltonian constraint, leading to two new quantum-modified black hole models that overcome limitations found in previous works.
This paper derives a new covariant effective Hamiltonian constraint in spherically symmetric quantum gravity that resolves the classical singularity into a Schwarzschild-de Sitter region with negative mass, thereby eliminating the Cauchy horizons typically found in previous models.
This paper investigates the quantum transition between Schwarzschild and string black holes in the large limit by reducing the problem to two dimensions via T-duality, deriving the Wheeler-De Witt equation to treat the geometries as distinct wave function states, and calculating the transition probability driven by string coupling.
This paper proposes a method to derive the Bekenstein-Hawking entropy of extremal black holes by calculating the entanglement entropy of disconnected one-dimensional conformal quantum mechanics systems, thereby demonstrating that horizon entropy fundamentally originates from quantum entanglement.
This paper presents a perturbative framework for incorporating the effects of dark matter spikes around supermassive black holes into first post-adiabatic order gravitational waveform modeling for extreme mass-ratio inspirals, thereby enabling the use of these systems as precise probes of dark matter distribution.
This paper proposes a novel quasi-topological gravity model that unifies cosmological and black hole scenarios by replacing spacetime singularities with a "big bounce" and a "black bounce," respectively, thereby reproducing key results from loop quantum cosmology and the quantum Oppenheimer-Snyder model within a single, manifestly covariant framework.
This paper proposes constructing local gauge invariant operators on isometry-breaking backgrounds via the Stückelberg mechanism—effectively introducing physical clocks and rods—but argues that suppressing the resulting spacetime fluctuations to reliably define operators in localized regions (such as black hole islands) requires strong isometry breaking, potentially achieved through transitions to higher-dimensional black holes.
This paper demonstrates that Newtonian gravity can generate quantum entanglement between mesoscopic bodies only when the gravitational tidal field is quantized (as in the mini-superspace framework), whereas models treating the field as classical (semiclassical and stochastic gravity) fail to produce such entanglement.
This paper analytically and numerically solves the geodesic equations for null rays traversing the ring singularity of maximally extended Kerr spacetime to characterize the inner throat and forbidden polar bands, ultimately constructing simulated views for observers in the negative- domain that reveal strong image distortion and inversion.
This paper investigates the shadows of rotating traversable wormholes in the Teo class, demonstrating that a variable redshift parameter induces a universal critical value leading to cuspy structures and revealing four distinct shadow morphologies that could serve as observational diagnostics for compact objects.