2677 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 refines estimates of energy released as "scalar tsunamis" when light scalar fields surrounding collapsing stars are liberated upon black hole formation, demonstrating that while the total energy remains comparable to flat-space predictions, general relativity and improved initial modeling significantly alter the resulting energy spectrum.
Using a unified Bayesian framework to analyze CMB, BAO, and supernova data, the study finds that updated processing and recent measurements largely resolve apparent tensions in the standard CDM model, concluding that claims necessitating a shift to evolving dark energy models are premature.
This paper proposes a model-independent formalism centered on a universal Cosmological Form Factor (CFF) that, driven by the principles of statistical isotropy and locality, unifies the description of diverse primordial stochastic gravitational wave background anisotropies through a single angular structure and multipole scaling.
This paper investigates the canonical quantization of scalar and Maxwell fields in anti-de Sitter spacetime, establishing conditions for vacuum stability by demonstrating that a non-negative Hamiltonian can be achieved either through specific coupling constraints or by introducing ghost states with anti-commutation relations, while also confirming that the resulting renormalized energy-momentum tensors yield a stable, maximally symmetric vacuum.
This paper demonstrates that primordial black holes catalyze the chiral phase transition by inducing a novel mixed-order phase structure near their event horizons and significantly enhancing the inverse duration parameter, thereby causing substantial shifts in the peak frequency and amplitude of the resulting stochastic gravitational-wave signals.
This paper presents a systematic, gauge-invariant framework using worldline effective field theory and scattering amplitudes to compute gravitational Raman scattering at third post-Minkowskian order, demonstrating that while leading static Love numbers for black holes vanish, dynamical Love numbers exhibit logarithmic running that resolves previous off-shell ambiguities across various dimensions and spin fields.
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 study utilizes a second-order growth index parameterization and multi-probe observational data, including the latest DESI results, to constrain an interacting dark energy model, finding no statistical evidence for non-gravitational interactions between dark matter and dark energy and thereby establishing the growth index as a robust tool to distinguish such interactions from modified gravity theories.