3826 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.
Through a Hamiltonian constraint analysis of multivielbein theory under a restriction of equal boost functions, the authors demonstrate that the theory propagates one massless and massive spin-2 fields while successfully eliminating Boulware-Deser ghost instabilities via secondary constraints associated with lapse functions.
This paper demonstrates that in a massless scalar field cosmology where a discrete physical volume resolves the big bang singularity via a big bounce, quantum field theory and semiclassical gravity analyses reveal distinct particle production dynamics that peak at the bounce and evolve into a thermal-like spectrum, thereby linking gravity, quantum fields, and thermodynamics.
This paper investigates the large scalar spectral index () regime of -attractor T-models, demonstrating that while an extended stiff reheating stage can accommodate higher values, monomial T-models are strictly bounded by a maximum of 0.9682, providing a predictive benchmark to potentially rule out these models in the future.
This paper develops a canonical Post-Newtonian Hamiltonian framework for radiating charges by integrating the Landau-Lifshitz reduced radiation reaction into the Darwin system to derive inspiral laws, and extends this formalism to charged compact binaries in Einstein-Maxwell theory to characterize the transition between electromagnetic and gravitational flux-dominated inspirals.
This study presents detailed binary evolution models incorporating internal differential rotation and mass transfer to demonstrate that the stable mass transfer channel is a viable and significant pathway for producing merging binary black holes with masses and spins consistent with observed gravitational-wave sources.
This paper demonstrates that in massless scalar QED, the charge associated with divergent superphaserotations vanishes to all orders in the electromagnetic coupling due to the one-loop exactness of the classical logarithmic soft photon theorem, while also showing that infrared corrections to the subleading soft charge result in a vanishing tail to the velocity kick memory.
This study employs Bayesian Physics-Informed Neural Networks to demonstrate that combining a time-evolving dark energy equation of state (CPL) with massive neutrinos effectively alleviates the Hubble tension, reconciling early- and late-Universe measurements of to within a - range.
This paper establishes a dimension-independent no-go theorem for bulk fields in warped Randall-Sundrum braneworlds by deriving local consistency conditions that permit only free scalar fields and specific nonlinear electrodynamics models, while ruling out Maxwell fields, p-forms, and Dirac fermions regardless of the internal geometry or warp factor.
This paper demonstrates that while the dynamics of spinning compact bodies in Type-D Einstein spacetimes remain Liouville–Arnold integrable at quadratic order in spin for black holes () through the construction of generalized Carter and Rüdiger constants, this integrability breaks down for non-black-hole objects (), highlighting the spin-induced quadrupole as a critical probe of internal structure.
This paper demonstrates that within effective field theories of gravity, primordial black holes can survive to the present day by gaining angular momentum through Hawking radiation similarly to general relativity, while their resulting near-extremal states produce detectable tidal forces for future gravitational-wave observatories.