3285 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 study employs Bayesian inference on various cosmological datasets to demonstrate that bulk viscous cold dark matter models, while thermodynamically consistent and offering partial alleviation of the Hubble tension, ultimately fail to resolve the discrepancy or outperform the standard CDM model.
This paper investigates the cosmological expansion of the universe within the framework of gravity using the specific model , demonstrating that while the model can fit Type Ia supernovae data for certain parameter ranges, it performs significantly worse than the standard cosmological model as the exponent approaches zero.
This paper presents a causal, stable, and well-posed first-order framework for thermoelectric conduction in curved spacetime, which is used to analyze relativistic gravitothermoelectric effects in accelerating metals and derive a relativistic Thomas-Fermi equation for charge distribution in compact astrophysical objects.
This paper presents a flexible Bayesian method for estimating the power spectral density of LISA noise by combining parametric models with adaptive penalized B-splines, achieving high accuracy and computational efficiency suitable for long-duration mission data analysis.
This paper investigates FLRW cosmology in symmetric teleparallel gravity with a nonminimal dark matter coupling, demonstrating that the noncoincidence gauge enables a multi-scalar field representation where the coupling facilitates a viable matter-dominated era and late-time acceleration, with the de Sitter solution emerging as the unique future attractor for power-law theories.
This paper proposes a natural extension of Kaluza-Klein theory where a higher-dimensional Lorentzian manifold with a Cauchy horizon projects onto a lower-dimensional quotient manifold that undergoes a signature change from Lorentzian to Riemannian, effectively demonstrating a "signature change without signature change" scenario.
This paper investigates the quantum dynamics and thermodynamics of a Minkowski-Minkowski wormhole by applying path-integral quantization to a minisuperspace model, demonstrating that topology-changing transitions are suppressed by the Hessian determinant while deriving the wormhole's temperature and entropy from the discontinuity of extrinsic curvature to establish a thermodynamic first law.
This paper establishes a generalized definition of gravitational entropy as a charge associated with local boosts within the covariant phase space formalism, demonstrating that its variation along any causal observer's path is non-negative provided the matter content satisfies the strong energy condition.
This paper investigates charged black hole solutions in two-dimensional heterotic string theory using a T-duality-invariant formalism, analyzing their dual geometries, singularities, and gauge dependence while extending a non-perturbative solution to scenarios with multiple abelian fields.
This paper extends the theory of gravitational wave interactions with viscous fluids to general static, spherically symmetric spacetimes, revealing that damping and heating effects in astrophysical scenarios like core-collapse supernovae and black hole mergers can be orders of magnitude stronger than in flat space, potentially leading to complete signal damping and gamma-ray bursts.