2593 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 refutes a recent claim that twelve short-timescale microlensing candidates in the Andromeda Galaxy indicate a population of planetary-mass primordial black holes, demonstrating instead that all candidates are variable stars and providing no evidence for such black holes as dark matter.
This paper demonstrates that specific dynamical wormhole solutions in Einstein's equations can persist through a cosmological bounce without undergoing topology change, remaining valid across contracting, expanding, and bouncing phases of the universe.
This paper applies a postmodern and post-postmodern lens to semiclassical gravity, arguing that the inherent tension between observer-dependent and observer-free descriptions of closed universes should be embraced as a fundamental feature of quantum gravity rather than resolved.
This paper resolves the thermodynamic limitations of event horizons by demonstrating that quasi-local horizons allow for a robust formulation of the first and second laws of black hole mechanics applicable to dynamical black holes arbitrarily far from equilibrium, thereby identifying black hole entropy with the area of marginally trapped surfaces rather than the event horizon.
This paper uses numerical techniques on BFSS Matrix theory at strong coupling to demonstrate that the general relativistic force between two static objects emerges as an entropic force, thereby validating Verlinde's entropic gravity and the fuzzball paradigm while suggesting that black hole interiors are better described by AdS space rather than a traditional singularity.
This paper establishes a No-Go theorem proving that within analytic gravitational theories, treating quantum corrections solely as effective matter sources is insufficient to resolve singularities in gravitational collapse, thereby necessitating non-analytic action modifications or vanishing effective energy density at high densities for successful singularity resolution.
This paper proposes that quantum Oppenheimer-Snyder primordial black holes, which exhibit suppressed Hawking emission due to quantum gravity corrections, can account for all dark matter by relaxing gamma-ray constraints and expanding the viable asteroid-mass window compared to standard Schwarzschild models.
This paper investigates Lorentz-violating effects in a rotating bumblebee black hole, revealing that such violations suppress Lense-Thirring precession while enhancing geodetic and periastron precession, and significantly alter accretion disk images by shrinking the inner shadow, thereby offering complementary observational probes for strong-field gravity.
This paper investigates phase transitions in anti-de Sitter black holes coexisting with anisotropic matter fields, demonstrating their resemblance to Reissner-Nordström black holes and analyzing the correlation between these thermodynamic phases and the Lyapunov exponents derived from unstable null geodesics.
This paper numerically demonstrates that semiclassical states in the one-vertex model of quantum-reduced loop gravity evolve to closely match classical homogeneous and isotropic cosmology, while also exhibiting a quantum-induced "bounce" that halts gravitational contraction and initiates expansion.