2558 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 proposes a phenomenological extension of the PNJL model where curvature-sensitive QCD confinement dynamics generate an effective dynamical vacuum component that drives late-time cosmic acceleration, offering a statistically competitive alternative to CDM that is consistent with current low-redshift cosmological observations.
This work investigates the detectability of non-rotating metrics of exotic compact objects in the Galactic Center using simulated polarized flare data from GRAVITY and GRAVITY+ and finds that while current uncertainties prevent distinguishing these models from standard black holes, future improved sensitivity could enable such tests, provided astrophysical complexities are adequately accounted for.
This paper presents static and expanding cosmological solutions containing benign negative mass singularities that yield a positive Komar mass, reduce the effective cosmological constant, and drive cosmic acceleration, thereby offering a potential alternative explanation for dark energy while challenging the notion that all naked singularities must be avoided.
This study demonstrates that while delays in the commissioning of next-generation gravitational-wave detectors minimally affect signal-to-noise ratios, they significantly degrade localization capabilities and multi-messenger potential, a challenge that can be effectively mitigated by the concurrent operation of current-generation detectors like LIGO India.
This paper demonstrates that a specific class of semi-classical gravity models, including the Newton-Schrödinger and Bohmian analogues, fails to generate entanglement between massive systems, thereby distinguishing them from standard quantum gravity predictions in the context of proposed experimental tests.
This work demonstrates that in composite gravity models in the infrared regime, dynamical tensor fields with finite kinetic terms emerge via the functional renormalization group flow, reproducing the transverse-traceless sector of the diffeomorphism-invariant Einstein-Hilbert action, while longitudinal and trace contributions remain uninterpreted as gauge-fixing artifacts.
This study demonstrates that the interpretation of the gravitational-wave event GW231123 as a merger of massive, highly-spinning black holes is robust against waveform model systematics and Gaussian detector noise, confirming that its key properties, particularly high mass and spin magnitudes, are reliably inferred using the NRSur7dq4 model.
This paper proposes a reformulation of the Diósi-Penrose model that derives wave-function collapse from a quantum Kushner-Stratonovich equation, treating the universe as a detector that filters quantum states via space-time homodyning of output quadratures rather than relying on postulated background gravitational fluctuations.
This paper investigates a renormalization-group improved Schwarzschild black hole, analyzing its horizon structure, shadow, quasinormal modes, and thermodynamic properties to demonstrate that it remains the most Schwarzschild-like regular black hole while exhibiting a Davies-type phase transition and near-marginal violations of Strong Cosmic Censorship at its inner Cauchy horizon.
This study demonstrates through analytical and numerical methods that the fundamental mode of black hole quasinormal frequencies exhibits extreme sensitivity to small perturbations in the effective potential, with the specific nature of this spectral instability depending on the potential's shape and the spatial behavior of the perturbations.