2489 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 provides a structural classification of linear Ricci-trace deformations of Einstein's equations, demonstrating that while common Rastall-gravity parametrizations are algebraically isomorphic, they only achieve operational equivalence under specific Newtonian calibration, and further distinguishes this class from Unimodular Gravity.
This paper introduces a new class of -type exact solutions in Finsler gravity that generalize known pp-waves, demonstrating that the resulting Finslerian gravitational waves produce observational signatures on interferometers that are indistinguishable from standard gravitational waves in general relativity.
This paper investigates the validity of the Generalized First and Second Laws of thermodynamics in Loop Quantum Cosmology models with spatial curvature, analyzing entropy corrections and exploring the potential role of negative absolute temperatures in resolving thermodynamic violations.
This paper investigates the quantum-corrected thermodynamics of Reissner-Nordström AdS black holes using a reduced gravitational path integral with off-shell geometries, revealing that these corrections modify the phase diagram by shrinking first-order transition regions, introducing zero-order transitions, and recovering traditional thermodynamics in the semi-classical limit.
This paper investigates a non-equilibrium thermodynamics-based cosmological model featuring adiabatic dark matter creation, finding that while one variant mimics the standard CDM scenario, another variant is statistically favored over CDM when incorporating recent DESI BAO data, suggesting dark energy may be an effective manifestation of matter creation.
This study extends existing formalism to analyze resonant interactions between extreme mass-ratio inspirals and generic third-body perturbers, finding that while these interactions do not significantly alter orbital dynamics, they can induce detectable phase shifts of approximately 0.1 radians in gravitational waveforms, necessitating their inclusion in accurate waveform models for future space-based detectors.
This paper demonstrates that standard quantum wave equations (Schrödinger, Klein-Gordon, and Dirac) and second quantization naturally emerge in 1+1 dimensions from a background-independent, relational framework where spacetime arises from entanglement and global energy-momentum constraints.
This paper presents a fully covariant and gauge-invariant analysis of linear cosmological perturbations in Energy-Momentum Squared Gravity, deriving exact propagation equations for scalar, vector, and tensor modes that reveal distinct observational signatures—such as modified density contrasts, early-time vorticity, and altered tensor damping—relative to General Relativity.
This paper demonstrates that an Euler-Korteweg vortex model in a specific fluid system can be mathematically reformulated to yield equations equivalent to the Schrödinger and Klein-Gordon equations, thereby establishing a fluid-mechanical analogue that reproduces fundamental quantum phenomena such as the de Broglie wavelength, the uncertainty principle, and relativistic wave dynamics.
Using 142 gravitational wave events from the GWTC-4.0 catalog, this study demonstrates that incorporating a novel parametric model featuring a heavy black hole mass scale at approximately 63.3 solar masses significantly improves Hubble constant constraints by about 30–36% compared to previous methods, highlighting the critical role of heavy black holes in standard siren cosmology.