2370 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 formulates Maxwell's equations in Schwarzschild spacetime using a tetrad-based framework to demonstrate how static observers perceive gravitational corrections as geometrical modifications to the medium, while freely falling observers experience additional kinematical effects that mix charge and current densities and intertwine electric and magnetic fields due to local radial boosts.
This paper formulates stochastic inflation within an open quantum system framework, demonstrating that the non-unitary evolution of a coarse-grained de Sitter patch yields a GKLS master equation whose Wigner transform reproduces classical stochastic inflation dynamics, while revealing that the validity of a classical stochastic description depends on the field mass, being applicable for light fields but failing for heavy fields that remain in a pure quantum state.
This paper investigates quantum steering harvesting between two Unruh-DeWitt detectors in a Lorentz-violating BTZ black hole, revealing a counterintuitive inversion where the detector in a hotter environment exhibits stronger steerability and demonstrating that Lorentz violation acts as a geometric constraint that suppresses maximal correlation extraction and alters the directionality of quantum correlations.
This paper challenges the prevailing view that Primordial Black Holes (PBHs) are generically fine-tuned dark matter candidates by demonstrating that, when evaluated across a broad landscape of production mechanisms and compared to particle dark matter benchmarks using uniform naturalness measures, PBHs span a full spectrum of naturalness tiers ranging from as natural as standard WIMPs to severely tuned, thereby proving that dismissing them as a whole conflates worst-case scenarios with a diverse landscape of viable models.
This paper analyzes the strong deflection limit of light by charged black holes in Einstein-Maxwell-Dilaton spacetime by demonstrating that the deflection angle satisfies Picard-Fuchs equations, which are then solved using the integrability of Painlevé VI systems to uniquely determine the logarithmic expansion coefficients and consistent with the Schwarzschild limit.
This paper demonstrates that propagating quantized gravitons can induce entanglement between two massive particles in a harmonic oscillator potential through their commutation relations, establishing that this entanglement arises from quantum gravitational effects with a causal time delay proportional to the distance between the particles, which can be slightly enhanced using squeezed initial states.
This paper establishes stringent Solar-System constraints on a new class of Ricci-flat spindle deformations of the Schwarzschild metric by demonstrating that the deformation parameter must be extremely small () to remain consistent with observed planetary perihelion precessions and Cassini light travel time measurements.
This paper uses Bayesian analysis of astrometric and spectroscopic data from the S2, S1, and S14 stars orbiting Sgr A* to constrain the cosmological constant at the Galactic Center, establishing upper bounds of at 68% credibility and at 95% credibility.
This paper demonstrates that machine learning and deep learning models can accurately classify compact stars as neutron stars or quark stars based on observable macroscopic properties like mass, radius, and tidal deformability, offering a promising tool for probing dense matter composition while noting the need for further validation with hybrid and exotic matter scenarios.
This paper argues that any viable theory of quantum gravity must satisfy an epistemological constraint requiring the recovery of objective geometrical measurability—ensuring the physical possibility of determining relational quantities through stable devices, causal access, and record formation—alongside the emergence of spacetime geometry itself.