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 presents a joint analysis of ACT, Planck, DESI, and PantheonPlus data to constrain cosmic birefringence induced by early dark energy, finding that the combined dataset supports a higher Hubble constant ( km/s/Mpc) and a significant early dark energy fraction ().
This paper investigates boundary mutual information in a double holography setup of AdS gravity coupled to a flat heat bath, using numerical surface optimization and random tensor networks to reveal a phase transition and demonstrate that bulk quantum fields induce a negative correction to the mutual information, causing the geometric contribution to exceed the total value.
This paper emphasizes the critical importance of subdominant multipole asymmetries in binary black-hole mergers for accurately calculating recoil velocities and inferring system parameters, demonstrating that neglecting them introduces significant systematic biases and proposing universal characteristics of these asymmetries for future modeling and detection with third-generation gravitational-wave observatories.
This paper constructs reversible holographic heat engines for Schwarzschild black holes in asymptotically flat spacetime by treating the thermodynamics of a finite spherical cavity as the working substance, deriving and comparing the exact efficiencies of various engine cycles to reveal how they approach the Carnot limit in the high-temperature regime.
This paper demonstrates that asymptotically Bertotti-Robinson multi-black hole solutions in Einstein-Maxwell theory can be constructed using three-dimensional sigma-model techniques, thereby avoiding the need for the monodromy-matrix approach.
This paper investigates the entanglement entropy of a conformally coupled scalar field in -dimensional Anti-de Sitter space, demonstrating that while the UV-divergent component remains universal, the finite part depends sensitively on the specific boundary conditions imposed at the conformal boundary.
This paper proposes a rigorous three-region spacetime model where a rotating black hole is surrounded by a Modified Chaplygin Gas envelope, demonstrating that the resulting deep gravitational potential creates radiative degeneracies that can mimic high-spin signatures and significantly alter accretion disk thermodynamics, thereby challenging standard black hole spin estimation techniques.
This paper investigates magnetic reconnection as an energy extraction mechanism in rotating four-dimensional Einstein-Gauss-Bonnet black holes, demonstrating that the Gauss-Bonnet coupling parameter significantly lowers the spin threshold for feasibility and that the plunging regime yields higher extraction power than the circular orbit case, surpassing the efficiency of the Blandford-Znajek mechanism.
This paper demonstrates that a specific smooth deformation of the non-rotating BTZ black hole creates a regular, extremal null throat connecting two isometric Lorentzian exteriors rather than inducing a signature change to a Riemannian geometry, while providing a complete analysis of its thermodynamic properties, stability, and effective matter source.
This paper investigates how anisotropic perfect fluid, constant-, and Bose-Einstein condensate dark matter equations of state modify the spacetime geometry of static, spherically symmetric black holes, deriving analytical and numerical solutions to constrain their parameters using strong gravity observables like shadow radii and orbital dynamics against Event Horizon Telescope data.