3875 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 the quantum-corrected thermodynamics of Reissner-Nordström AdS black holes using a reduced gravitational path integral with off-shell geometries, revealing that these corrections modify the phase diagram by shrinking first-order transition regions, introducing zero-order transitions, and recovering traditional thermodynamics in the semi-classical limit.
This paper investigates a non-equilibrium thermodynamics-based cosmological model featuring adiabatic dark matter creation, finding that while one variant mimics the standard CDM scenario, another variant is statistically favored over CDM when incorporating recent DESI BAO data, suggesting dark energy may be an effective manifestation of matter creation.
This study extends existing formalism to analyze resonant interactions between extreme mass-ratio inspirals and generic third-body perturbers, finding that while these interactions do not significantly alter orbital dynamics, they can induce detectable phase shifts of approximately 0.1 radians in gravitational waveforms, necessitating their inclusion in accurate waveform models for future space-based detectors.
This paper demonstrates that standard quantum wave equations (Schrödinger, Klein-Gordon, and Dirac) and second quantization naturally emerge in 1+1 dimensions from a background-independent, relational framework where spacetime arises from entanglement and global energy-momentum constraints.
This paper presents a fully covariant and gauge-invariant analysis of linear cosmological perturbations in Energy-Momentum Squared Gravity, deriving exact propagation equations for scalar, vector, and tensor modes that reveal distinct observational signatures—such as modified density contrasts, early-time vorticity, and altered tensor damping—relative to General Relativity.
This paper demonstrates that an Euler-Korteweg vortex model in a specific fluid system can be mathematically reformulated to yield equations equivalent to the Schrödinger and Klein-Gordon equations, thereby establishing a fluid-mechanical analogue that reproduces fundamental quantum phenomena such as the de Broglie wavelength, the uncertainty principle, and relativistic wave dynamics.
Using 142 gravitational wave events from the GWTC-4.0 catalog, this study demonstrates that incorporating a novel parametric model featuring a heavy black hole mass scale at approximately 63.3 solar masses significantly improves Hubble constant constraints by about 30–36% compared to previous methods, highlighting the critical role of heavy black holes in standard siren cosmology.
This paper utilizes a mapping between Einstein--Scalar--Maxwell and gauged Skyrme--Maxwell--Einstein theories to derive novel, closed-form mass formulas for Melvin and Bonnor--Bertotti--Robinson spacetimes, revealing a specific linear-to-nonlinear relationship between mass and baryonic charge that facilitates the interpretation of gravitating scalar configurations in terms of baryonic quantities.
This paper investigates odd-parity gravitational perturbations of static black holes in trace-quadratic gravity with anisotropic matter, identifying a regular admissible branch where the axial ringdown spectrum is governed by a single master equation and exhibits a significant mass-normalized deviation from Schwarzschild while showing negligible direct dependence on the trace coupling parameter .
This paper employs the DARK-FLIP II framework to demonstrate that the relativistic intermediate-axis instability flip frequency around rotating black holes is robustly sensitive to dark matter profiles, serving as a controlled diagnostic clock where increased dark matter normalization decreases the frequency and extended profiles weaken the local response.