4035 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 reformulates Simon's entanglement criterion using the partner formula to demonstrate that entanglement harvesting from a quantum field is prohibited under specific conditions, revealing that Hawking radiation, analogous to the Unruh effect, lacks quantum correlations between its emitted real particles.
This paper proposes a covariant, ADM-based definition of an inertia tensor on spatial hypersurfaces using geodesic distances and the exponential map, demonstrating how spatial curvature modifies moments of inertia in FLRW spacetimes and recovering known relativistic corrections for rotating stars while unifying these results with multipole formalisms.
This paper investigates a regime of resonant inflation where small, rapid potential oscillations shift observable signatures from the power spectrum to higher-order -point correlation functions (), which exhibit thousands of oscillations per decade in momentum space.
This paper establishes a universal, gauge-invariant framework using modern on-shell amplitude techniques to analyze black hole emission and absorption processes, successfully deriving the Hawking thermal spectrum from three-point processes and characterizing vacuum-dependent quantum fluctuations in the mass shift of black holes within binary systems.
This paper investigates linearly stable black hole solutions in nonlinear electrodynamics coupled with Horndeski vector-tensor theory, finding that while nonsingular black holes are inherently unstable due to Laplacian instabilities, singular black holes can satisfy stability conditions only if the Horndeski coupling is sufficiently weak, as strong coupling generally induces instabilities in the high-curvature regime.
This study investigates how various dark energy equation of state parametrizations influence black hole mass accretion within a Modified Chaplygin Gas cosmological background, revealing that the logarithmic mass ratio is highly sensitive to the temporal evolution of dark energy and serves as a probe for the interplay between local strong gravity and global cosmic expansion.
This paper establishes a generalized Birkhoff theorem for 2+2 direct product spacetimes in Weyl conformal gravity sourced by separated electromagnetic and Yang--Mills fields, demonstrating the existence of two commuting Killing vectors to derive general solutions and analyze their geometric and physical properties through conformal equivalence.
This paper revisits and explicitly constructs the unique, complete real Lagrangian for pure supergravity in four-dimensional de Sitter spacetime, addressing previous concerns about non-unitarity by suggesting that the theory may be viable within a Euclidean quantum gravity framework.
This paper reports the experimental realization of a matter-wave Fabry-Pérot cavity in the ultrastrong driving regime, where a periodically translated light barrier induces curved-spacetime-like dynamics in a quasi-relativistic matter wave, successfully observing predicted fixed-point trajectories and demonstrating tunable stability through waveform modulation.
By reformulating a gedankenexperiment involving gravitational wave detectors, the authors demonstrate that quantum fluctuations in gravitational radiation prevent superluminal signaling, thereby establishing that the consistency of general relativity with quantum mechanics necessitates the quantization of gravitational waves even when they originate from strong gravity sources like rotating black holes.