3151 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 covariant and gauge-invariant framework for analyzing radial adiabatic perturbations in self-gravitating imperfect fluids, comparing predictions from various thermodynamic theories and establishing an upper bound on the maximum compactness of dynamically stable stars with anisotropic pressures.
This paper demonstrates that chaotic migration driven by turbulent gas torques in accretion disks can induce detectable gravitational wave dephasing in LISA extreme mass ratio inspirals under specific conditions, highlighting the critical need for magnetohydrodynamic simulations to accurately model these effects beyond standard laminar disk assumptions.
This paper demonstrates that Pulsar Timing Arrays can detect "zombie binaries"—supermassive black hole pairs that merged prior to observation—by analyzing the pulsar term in gravitational wave signals, a capability expected to yield a few detectable events with the Square Kilometer Array.
This paper demonstrates that while relativistic effects in the Fourier-space galaxy power spectrum exhibit strong degeneracies among different k-essence models, the angular power spectrum significantly amplifies these effects—particularly for tachyon fields—making it a more robust probe for detecting non-standard dark energy and highlighting the necessity of full relativistic modeling in upcoming horizon-scale surveys.
This paper presents an invariant relational path-integral quantization framework for general-relativistic gauge field theories based on the Dressing Field Method, which implements an automatic anomaly-cancellation mechanism to unify invariant schemes across electroweak and cosmological contexts while remaining amenable to lattice implementations.
This paper proposes that combining future Hz-band Earth-term detections of supermassive black hole binaries with historical nHz-band "gravity echoes" recorded by pulsar timing arrays will create a unique temporal baseline, enabling precise sky localization, direct measurement of long-term inspiral rates, and coherent tracing of post-Newtonian evolution across kiloparsec baselines.
This paper proposes a method to detect archival, low-frequency gravitational-wave signals from massive black hole binary mergers by analyzing time-delayed "orphaned" pulsar terms in pulsar timing array data, enabling multiband observations in conjunction with future space-based interferometers like LISA.
This paper proposes a modified gravity framework where baryonic matter acts as an impurity in a Higgs-like vacuum field, generating a buoyancy force that violates the Weak Equivalence Principle to explain galactic rotation curves and cosmological fine-tuning without invoking dark matter or dark energy.
This paper demonstrates that an ultralight vector dark matter field, by breaking spatial isotropy and inducing mixing between scalar and tensor perturbations in a Bianchi I geometry, acts as a source for a stochastic cosmological gravitational wave background, the spectrum of which is computed using a modified version of the CLASS code.
This paper demonstrates that an Unruh-DeWitt detector's transition rates in a four-dimensional Minkowski spacetime with toroidal spatial topology () encode signatures of the global topology, revealing how local quantum measurements can detect large-scale spatial structure through the analysis of inertial and accelerated trajectories.