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 derives the complete leading-order quasi-static near-zone response of magnetic GHS black holes to slowly varying exterior moduli by utilizing a canonical-slice and Fredholm framework to prove the existence and uniqueness of the solution, explicitly solving for scalar, mass, and lapse lags while recovering the exact marginal horizon.
This paper numerically investigates the absorption cross-section and greybody factors of massless scalar fields by charged black holes in Loop Quantum Gravity, revealing how quantum and charge parameters distinctly influence absorption peaks and troughs while demonstrating agreement with classical limits and identifying scenarios where LQG black holes mimic Reissner-Nordström behavior.
This paper demonstrates that the information content of gravitational-wave signals in pulsar timing arrays can be effectively captured by a low-dimensional summary statistic, specifically requiring only the lowest-order spherical harmonic coefficients of the Earth term map and the monopole (or dipole for point sources) of the pulsar term variance to retain approximately 95% of the signal information.
This paper investigates how 3-form dark energy coupled to photons via dimension-4 and dimension-6 operators can explain observed cosmic birefringence, revealing that while the dimension-4 operator offers a viable explanation sensitive to initial conditions, the dimension-6 operator requires unrealistically large couplings, with both scenarios producing birefringence profiles that can either mimic or be distinguished from axion-like particle models depending on early-universe field configurations.
This paper investigates the reflected entropy and Markov gap for bosonic fields across event horizons in non-inertial frames and Schwarzschild black holes, revealing that while bosonic entanglement vanishes asymptotically, reflected entropy saturates at a non-zero floor and inter-wedge entropy diverges linearly with the squeezing parameter—a sharp contrast to the bounded behavior observed in fermionic systems.
This paper introduces an intrinsic measure of quantum information loss based on retrodiction failure, proves that its vanishing is equivalent to the Knill-Laflamme conditions for perfect quantum error correction via a concept termed "universal pristineness," and applies this framework to demonstrate asymptotic information retrieval in the Hayden-Preskill black hole evaporation model.
This paper proposes a unified framework where thermal relaxation of axions in an expanding plasma partitions dark matter into coherent and stochastic components, resulting in a relic population with lower mean momentum, reduced isocurvature, and distinct structural properties compared to standard equilibrium scenarios.
This paper establishes a rigorous quantitative framework for charge-assisted Penrose energy extraction in Reissner–Nordström–Anti-de Sitter black holes surrounded by Kiselev dark energy, proving the uniqueness of the ergosphere and negative energy trajectories while deriving local efficiency bounds and adiabatic evolution laws for the system.
This paper derives and tests kinematic upper bounds on charged energy extraction from static black holes with Euler--Heisenberg nonlinear electrodynamics, demonstrating that while the local extraction limit is governed by the horizon potential, the asymptotic spacetime structure ultimately determines the feasibility of outward trajectories.
This paper establishes a comprehensive framework for finite-dimensional quantum histories by deriving exact spectral solutions for cyclic unitary steps via monodromy invariants, defining predictive quotients for sharp finite clocks with proven error bounds, and characterizing the conditions under which clock changes preserve exact covariance versus irreversible coarse-graining.