3967 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 with hadronic and quark matter models to demonstrate that while the presence of large quark cores in 1.4 solar mass neutron stars depends on the specific quark model used, both frameworks predict quark matter in 2 solar mass stars, with the mass-radius curve slope serving as a key indicator of non-nucleonic matter.
This paper investigates how a fundamental zero-point length () from quantum gravity modifies Friedmann equations and generates baryon asymmetry during the radiation epoch, ultimately constraining to be less than approximately meters (about 440 times the Planck length) while demonstrating that such corrections slow the early Universe's expansion and maintain higher temperatures for longer durations.
This paper reviews the recent debate regarding the absence of a spin Hall effect in uniform gravitational fields, highlighting key distinctions from the anomalous spin Hall effect observed in ferromagnets despite their Hamiltonians sharing a similar mathematical form.
This paper, which purported to discuss regular magnetically charged black holes from nonlinear electrodynamics, was withdrawn from arXiv due to disputed and unverifiable authorship and affiliation.
This paper investigates late-time cosmic acceleration in a spatially flat FLRW universe within gravity by modeling matter as a bulk viscous fluid with a free equation-of-state parameter, demonstrating through observational constraints and diagnostic tools that this scenario provides a viable alternative to the standard CDM model.
This paper proposes a novel solution to the cosmological constant problem within pre-geometric gravity, where spacetime emergence and symmetry breaking dynamically link the Gauss-Bonnet coupling to de Sitter entropy, quantizing the cosmological constant into discrete topological sectors and naturally selecting the observed vacuum state through a stabilizing potential barrier.
This paper investigates static, spherically symmetric solitonic boson stars in general relativity and incompressible perfect fluid ultracompact objects in gravity to compare their structural similarities, assess their ability to exceed the Buchdahl limit, and clarify the stability properties of these black-hole mimickers.
This paper proposes a theory explaining the Crab pulsar's high-frequency interpulse "zebra" spectral pattern as interference maxima from gravitational and plasma lensing, enabling magnetospheric tomography and predicting observable frequency-dependent trends for testing strong-field gravity.
This study presents new constraints on a string-motivated Chameleon dark energy model, revealing a mild preference for a non-zero dark sector coupling () and weak evidence favoring the interaction over CDM when combining Planck, DESI DR2, and SH0ES data, despite the model's asymptotic return to limiting the strength of this evidence.
This paper investigates the quantum field descriptions of massive Carrollian theories, including scalar, fermion, and electrodynamics models, with a specific focus on resolving gauge-dependence issues in scalar Carrollian electrodynamics through careful gauge fixing and demonstrating the triviality of certain abelian theories due to the absence of loop corrections.