4015 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 investigates a gravitational baryogenesis mechanism within gravity's rainbow, demonstrating how energy-dependent spacetime modifications and specific rainbow functions enable the generation of viable baryon asymmetry consistent with observational data through power-law cosmological solutions.
This paper presents the first Bayesian search for continuous picohertz gravitational waves using the drifts of pulsar binary orbital and spin periods, achieving a tenfold sensitivity improvement over previous efforts and demonstrating that future Square Kilometre Array observations will be capable of detecting signals from supermassive black hole mergers and probing new physics.
This paper employs a 2-dimensional theory space analysis (- plane) to demonstrate that gravity models capable of exactly mimicking CDM expansion histories are prone to instability, while those accommodating phantom crossing scenarios inevitably suffer from tachyonic instability, all without requiring explicit functional reconstruction of the gravity theory.
This paper employs dynamical systems methods to demonstrate how cosmological relaxation in a string-inspired dilaton model drives the universe toward a least-coupling fixed point, thereby naturally suppressing deviations from the equivalence principle through a global mechanism distinct from local environmental screening.
This paper investigates whether superluminal photon propagation in the Drummond-Hathrell effective action violates causality in curved spacetime by applying global causal structure analysis and quantum-field-theoretic microcausality diagnostics, concluding that such propagation remains causally benign within the theory's regime of validity for specific gravitational backgrounds.
Using a unified Bayesian framework to analyze CMB, BAO, and supernova data, the study finds that updated processing and recent measurements largely resolve apparent tensions in the standard CDM model, concluding that claims necessitating a shift to evolving dark energy models are premature.
This paper proposes a model-independent formalism centered on a universal Cosmological Form Factor (CFF) that, driven by the principles of statistical isotropy and locality, unifies the description of diverse primordial stochastic gravitational wave background anisotropies through a single angular structure and multipole scaling.
This paper investigates the canonical quantization of scalar and Maxwell fields in anti-de Sitter spacetime, establishing conditions for vacuum stability by demonstrating that a non-negative Hamiltonian can be achieved either through specific coupling constraints or by introducing ghost states with anti-commutation relations, while also confirming that the resulting renormalized energy-momentum tensors yield a stable, maximally symmetric vacuum.
This paper demonstrates that primordial black holes catalyze the chiral phase transition by inducing a novel mixed-order phase structure near their event horizons and significantly enhancing the inverse duration parameter, thereby causing substantial shifts in the peak frequency and amplitude of the resulting stochastic gravitational-wave signals.
This paper presents a systematic, gauge-invariant framework using worldline effective field theory and scattering amplitudes to compute gravitational Raman scattering at third post-Minkowskian order, demonstrating that while leading static Love numbers for black holes vanish, dynamical Love numbers exhibit logarithmic running that resolves previous off-shell ambiguities across various dimensions and spin fields.