3826 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 pulsar timing observations with next-generation radio telescopes, such as the SKA, can effectively detect or constrain the existence of an intermediate-mass black hole companion to Sagittarius A* by measuring its gravitational perturbations on pulsars, even amidst the complex astrophysical environment of the Galactic Center.
This paper establishes exact analytical thresholds and a unified thermodynamic state-space representation for regular Hayward black holes, precisely mapping their phase transitions, horizon bistability, and non-area law entropy to provide a quantitative framework for quantum-gravity phenomenology without numerical approximations.
This paper investigates inflationary primordial perturbations in -Minkowski non-commutative space-time by deriving a modified Mukhanov-Sasaki equation that predicts scale-dependent corrections to the power spectrum and spectral index, subsequently constraining the deformation length scale to approximately meters using ACT DR6 data.
This paper extends the Magnusian framework to dissipative systems with nonlocal-in-time interactions using the in-in formalism, deriving a generalized generator that successfully models the finite-time evolution of Newtonian bound motion under leading 2.5PN radiation-reaction forces.
This paper introduces a unified framework for analyzing time-dependent two-mode bosonic systems by reducing their dynamics to a single Riccati equation for the Bogoliubov ratio, enabling the direct calculation of key quantum-information metrics like entropy and purity without model-specific diagonalization, as demonstrated in applications to cosmological perturbations and optical parametric amplifiers.
This paper demonstrates that applying a large boost to a hydrodynamic system alters the convergence of its long-wavelength expansion by shifting the limiting nonhydrodynamic singularity to the near-light-cone region of the rest-frame spectrum, where the rescaled convergence scale is governed by the theory's microscopic spectral structure.
This paper investigates the phenomenological effects of a noncommutative deformation on Einstein-Rosen gravitational waves, demonstrating that the deformation induces a coupling between radial and longitudinal sectors where longitudinal test-particle dynamics exhibit enhanced sensitivity to the ultraviolet structure of the wave profile, resulting in quasi-periodic or impulsive responses depending on the wave type.
This paper derives a complete analytical form for the overlap reduction function in massive gravity theories, extending the standard Hellings-Downs curve to include additional polarization states and graviton mass effects, thereby establishing a foundational framework for Pulsar Timing Arrays to detect the Stochastic Gravitational Wave Background and test massive spin-2 dark matter candidates.
This paper proposes a novel detection scheme for measuring the frame-dragging frequency of rotating celestial bodies by analyzing the common envelope of time-dependent excitation rates of atoms interacting with a quantized massless scalar field in curved spacetime, thereby eliminating the need for traditional starlight calibration.
By comparing observed rates of Luminous Red Novae and compact binary mergers, this study finds that only a tiny fraction () of Luminous Red Novae result in compact binary mergers detectable by gravitational-wave observatories, suggesting that most such events lead to stellar mergers rather than compact object binaries.