2593 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 demonstrates that in axion monodromy inflation, oscillatory modulations of the potential continuously excite heavy moduli fields, thereby invalidating the conventional single-field approximation and generating detectable cosmological collider signals in the primordial bispectrum that bypass standard Boltzmann suppression.
This paper proposes a novel framework where a spontaneously broken global symmetry generates a residual symmetry that stabilizes dark matter while suppressing proton decay to the one-loop level, thereby linking the proton lifetime to dark matter mass and predicting distinctive TeV-scale leptoquark signatures accessible to current and future experiments.
This paper investigates a cosmological model where a Gauss-Bonnet-coupled scalar field (dark energy) interacts with fermionic dark matter, demonstrating that both exponential and power-law potentials yield expansion histories consistent with current observational data and the standard CDM model while allowing for testable deviations in gravitational wave propagation.
This study extends recent findings on the long-term stability of spherically symmetric ultracompact boson stars by decomposing simulation data into spherical harmonics to initiate the characterization of their non-spherical angular modes.
This paper challenges the conventional view that black holes must contain singularities or Cauchy horizons by demonstrating that a charged, evaporating black hole can remain non-singular due to electromagnetic repulsion and Hawking radiation-induced energy condition violations, a mechanism the authors suggest may also apply to rotating astrophysical black holes.
This paper proposes that pulsar polarimetry, when cross-correlated with timing data, can detect parity-violating circular polarization in nanohertz stochastic gravitational wave backgrounds by inducing a measurable rotation in pulsar polarization signals that shares the characteristic Hellings-Downs angular pattern.
This paper proposes extending quantum mechanics to an enlarged Hilbert space that restores a fundamental symmetry between space-time and momentum-energy sectors, a dual-manifold structure that independently reproduces key cosmological phenomena such as dark energy and Hawking radiation.
This paper generalizes the Kerr-Schild gauge to non-null deformation vectors, demonstrating that such deformations yield finite curvature expansions and establishing that the resulting metric is Ricci flat if and only if the deformation vector is irrotational (and consequently geodesic) in the background spacetime.
This paper demonstrates that including quantum cross-correlation terms in the effective Hamiltonian of Brans-Dicke Bianchi I cosmology is essential for preventing unphysical divergences and ensuring consistent dynamics, revealing that these correlations smooth bounces, suppress or enhance anisotropy depending on the coupling parameter, and encode crucial Planck-scale information with implications for quantum gravity phenomenology.
This paper outlines the site selection constraints and viable deployment options for the LILA-Pioneer and LILA-Horizon lunar gravitational wave detectors, demonstrating that while their scientific return is independent of location, practical requirements such as seismic isolation, environmental protection, and accessibility significantly narrow the range of suitable lunar sites.