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 presents a general analytic expression for the N-body second-order post-Newtonian (2PN) Hamiltonian in the ADM gauge containing a single integral term, demonstrates that this term can be evaluated numerically to machine precision, and validates the practical feasibility of integrating the resulting equations of motion for N bodies.
By analyzing NANOGrav 15-year data to model the impact of initial galactic center density and binary eccentricity on the gravitational wave spectrum, this study infers a preferred parsec-scale central density of approximately , suggesting that stellar and dark matter ejections significantly shape the evolution of supermassive black hole binaries.
This paper employs a specific gauge-fixing and integration order to derive a novel -dimensional collective field action for a two-matrix BFSS-like model, revealing non-local features that require a mass term for time-locality while recovering the standard single-matrix limit.
This paper proposes that the apparent phantom dark energy behavior suggested by recent cosmological data is not intrinsic but rather an effective phenomenon caused by a non-gravitational interaction between dark matter and non-phantom dark energy, which is favored by the data at over significance.
This paper presents the complete metric transformations from generalized harmonic to Newman-Unti coordinates up to the second post-Minkowskian order, enabling the determination of the asymptotic shear, Bondi mass aspect, and angular-momentum aspect at both orders.
This paper computes the classical one-loop gravitational Compton amplitude for graviton scattering off a massive spinning compact object at the second post-Minkowskian order up to quartic spin and hexadecapolar finite-size effects, deriving the corresponding scattering phase and explicitly linking the spin-independent contribution to a massless scalar probe in a Kerr background.
This paper establishes a covariant framework for the Hamiltonian formalism in relativistic field theories and applies it to derive the properties of the Hamilton principal functional across Newtonian mechanics, relativistic mechanics, Klein-Gordon theory, electromagnetism, and Ashtekar-Barbero-Immirzi gravity.
This paper reviews the physical basis of locality in relativistic physics and discusses how the coupling between radiation helicity and an observer's rotation modifies the standard formulas for the Doppler effect and aberration of polarized electromagnetic or gravitational waves.
This paper demonstrates that tree-level cosmological correlators in de Sitter space can be systematically reconstructed from their discontinuities using momentum-space dispersion relations and cutting rules, thereby deriving dressing rules that connect these correlators to flat-space Feynman diagrams while emphasizing the fundamental role of unitarity.
This paper demonstrates that while kinematic quantum time dilation is universal across all clock mechanisms like its classical counterpart, gravitational quantum time dilation is not, and further reveals the existence of a purely quantum time dilation effect arising from higher-order Hamiltonian corrections that has no classical analog.