3155 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 presents a model-independent search for gravitational lensing signatures in the record-breaking GW231123 event using the mu-GLANCE method, finding no definitive evidence for lensing due to significant waveform systematics but identifying a potential microlensing feature that suggests future detectability with improved models.
This paper reanalyzes the heavy binary black hole event GW231123 using a complete physical model to demonstrate that the event exhibits no significant eccentricity and that previous discrepancies in parameter estimates stem from waveform model disagreements regarding strong spin precession rather than orbital eccentricity.
This paper presents a Bayesian analysis showing that thawing quintessence is consistently favored over a cosmological constant when combining DESI DR2, Planck+ACT, and supernova data, a result that is robust to prior choices but dependent on the inclusion of supernovae, while also identifying the Deviance Information Criterion as the most reliable model selection metric and mapping observationally compatible thawing trajectories.
This paper presents a preliminary data analysis pipeline for the Taiji space mission that successfully reconstructs the isotropic stochastic gravitational wave background, demonstrating its ability to recover both known and unknown spectral morphologies from simulated datasets while addressing the unique challenges of space-based noise separation.
This paper introduces a non-perturbative formalism inspired by Feshbach's projector method to compute 5-point scattering amplitudes and derive gravitational waveforms for arbitrary two-body trajectories by relating effective emission potentials to perturbative amplitudes and applying the KMOC framework.
This paper presents a numerical investigation demonstrating that, unlike the Jang/zero divergence system which exhibits a finite-radius breakdown, coupling the generalized Jang equation to the conformal flow of metrics in spherically symmetric, time-symmetric settings preserves solution regularity, suggesting this modified system remains a viable approach for proving the Penrose conjecture.
This paper employs dynamical system analysis to investigate the evolutionary phases of the Universe within gravity coupled with a scalar field, identifying stable critical points that correspond to distinct cosmological eras through the examination of key parameters like the deceleration parameter and equation of state.
This paper resolves the tension between higher-derivative quantum corrections and Ostrogradsky ghost instabilities in DHOST theories by proving that the algebraic conditions derived from gauge symmetry invariance are mathematically identical to the dynamical constraints required for Hamiltonian stability, thereby establishing symmetry principles as a robust tool for constructing ghost-free gravitational effective field theories.
This paper investigates energy conditions in static, spherically symmetric spacetimes, proposing a systematic algorithm to generate null energy condition-compliant solutions and presenting a specific logarithmic Schwarzschild-like metric that satisfies all standard energy criteria while serving as an effective description for both horizon-bearing and horizonless compact objects.
This paper investigates static and spherically symmetric black holes with non-minimal couplings between curvature and the electromagnetic field, demonstrating that while all such couplings enlarge the event horizon and photon sphere, they produce distinct observational signatures in shadow size and photon ring separations that could provide new evidence for modifications to gravity.