3256 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 an exact analytical solution for a black hole immersed in an anisotropic dark sector background within a dynamical FLRW universe, demonstrating that its mass co-evolves with cosmic expansion as a dynamical response to the surrounding dark halo profile rather than through modifications to the black hole's internal equation of state.
This paper demonstrates that while conformal coupling shields superhorizon cosmological correlators from the details of the reheating epoch, non-minimal coupling induces a tachyonic enhancement that modifies the power spectrum and bispectrum, thereby opening an observable window into post-inflationary physics.
This paper proposes GravNet, a conceptual design for a global network of geographically separated detectors operating in strong magnetic fields to search for high-frequency gravitational waves (MHz to GHz) by synchronizing measurements to distinguish signals from noise and enhance detection significance.
This paper argues that while conventional quantum mechanics requires an anti-unitary time-reversal operator in orientable spacetimes to preserve energy positivity and commutation relations, spacetimes with non-orientable topology enable a purely unitary time-reversal operator by encoding the symmetry through geometry, thereby allowing for negative energy states.
This paper employs a non-perturbative parametrization to derive duality-invariant higher-derivative corrections to charged black holes in two-dimensional heterotic string theory, revealing that while the charge-to-mass ratio of extremal black holes is corrected, their entropy remains unrenormalized to all orders.
This paper re-examines the Belinfante-Rosenfeld ambiguity within Einstein-Cartan spacetimes using the bi-form formalism to physically interpret it as the choice of splitting a conserved current into its matter and gauge field contributions, thereby addressing the lack of consensus on describing spin polarization and transport.
This paper improves the robustness of center-of-mass frame fixing for numerical relativity waveforms by incorporating post-Newtonian boosted center-of-mass charge calculations to capture physical out-spiraling oscillations, thereby significantly reducing the sensitivity of fit parameters to the choice of fitting window and integrating the method into the `scri` Python package.
This paper constructs a continuous family of Fierz–Pauli systems for charged massive spin- particles interpolating between supergravity and decoupled-string limits, demonstrating that while both endpoints yield a gyromagnetic ratio of , only the supergravity realization remains consistent with dynamical gravity and non-constant electromagnetic fields due to the vanishing of specific quadratic chiral terms.
This paper establishes a multi-messenger framework for stalled supermassive black hole binaries in circumbinary discs, demonstrating how regularized fluid dynamics at Lindblad resonances drive shock-induced accretion bursts that generate a harmonic cascade of electromagnetic emission and a distinctive "background gas humming" gravitational wave signature, ultimately predicting a terminal burst near 4.0 mHz as a precursor to the final vacuum inspiral.
This paper resolves the divergence of the semiclassical partition function for spherically-symmetric AdS Einstein-Maxwell black holes by employing a Lorentzian gravitational path integral and Picard-Lefshetz analysis to demonstrate that only a finite subset of complex saddles contributes at finite temperature, while also establishing convergence for the analogous uncharged BTZ black hole case.