2613 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 Hawking radiation, including its thermal spectrum and horizon dependence in a collapse metric, emerges from the double copy of particle production in a background gauge field that lacks a global horizon, thereby unifying classical and quantum double copy prescriptions for black hole spacetimes through worldline and amplitude methods.
This paper presents a fully CMB-independent determination of the Hubble constant and dark energy parameters by combining 47 gravitational-wave standard sirens from GWTC-3 with DESI DR2 BAO and DESY5 SNe Ia data, yielding an value consistent with distance ladder measurements and mild evidence for phantom-crossing dark energy.
This study systematically investigates the gravitational wave emission from a population of millisecond pulsars proposed to explain the Galactic Center GeV gamma-ray excess, concluding that while current detectors cannot observe them, next-generation instruments like the Einstein Telescope and Cosmic Explorer may detect these signals to definitively test the pulsar versus dark matter interpretations of the excess.
This paper presents robust evidence for dynamical dark energy exhibiting a transition from phantom-like to quintessence-like behavior, achieving a 4.2σ significance level over the standard ΛCDM model through a comprehensive analysis combining DESI DR2, DESY5, and joint CMB data from ACT, SPT, and Planck.
This study utilizes long-term numerical-relativity simulations with fully tabulated finite-temperature equations of state to demonstrate that thermal treatment significantly influences the late-time gravitational-wave frequency evolution and convective stability of neutron star merger remnants, thereby challenging established quasi-universal relations and confirming the excitation of inertial modes detectable by future third-generation observatories.
This paper investigates -dimensional charged black hole solutions and gravitational wave polarizations within a specific M-subset of Einstein-aether theory, revealing a unique aether charge constraint, exact thermodynamic laws, and distinct wave propagation characteristics where spin-2 and spin-1 modes travel at unit speed while the longitudinal mode exhibits linear time dependence rather than behaving as a spin-0 mode.
This paper investigates the optical properties of a non-minimally coupled Einstein-Yang-Mills black hole with a thin accretion disk, revealing that the coupling parameter significantly alters the ISCO and photon sphere, extends the impact parameter range, enhances redshift, and ultimately produces a weaker observed intensity compared to Schwarzschild and Reissner-Nordström black holes across all inclination angles.
This paper investigates two non-singular cyclic universe models driven by a negative, time-varying cosmological constant, demonstrating that they can achieve physically acceptable positive energy density evolution and specific dynamical features like pressure sign flipping or phantom divide crossing without violating the null energy condition.
This study demonstrates that while extreme mass ratio inspiral (EMRI) parameter estimation in LISA is notably more robust to transient noise glitches than short-duration signals, weakly mitigated high-SNR glitch streams can still induce significant biases, underscoring the continued necessity of glitch modeling for unbiased analyses.
This paper analyzes various dynamical dark energy models against the latest cosmological observations (excluding SH0ES and structure formation data) and finds that the "flipped RVM," along with the XCDM and threshold RVM models, provides significant evidence for dynamical dark energy comparable to the CDM parameterization, particularly when using DES-Y5 data.