2575 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 gravitational eikonal scattering in nonlocal -dimensional theories to derive effective geometries that, when nonlinearly completed, yield singularity-free, asymptotically flat black hole solutions featuring a de Sitter core.
This paper demonstrates that even when classical and quantum dynamics are aligned at a specific moment during inflation, their correlation functions diverge exponentially by the end of inflation due to interactions, a difference illustrated through the bispectrum and tensor power spectrum that also clarifies the absence of poles in the scalar bispectrum from finite-time classical evolution.
This paper computes the conservative tidal dynamics and ten conserved quantities for spinless two-body systems at next-to-next-to leading post-Newtonian order in massless scalar-tensor theories and Einstein-scalar-Gauss-Bonnet gravity, utilizing both Fokker Lagrangian and effective field theory approaches to support future gravitational wave detector science cases.
This study demonstrates that while Hawking radiation and spacetime curvature degrade entanglement near Schwarzschild and GHS Dilaton black holes, quantum teleportation fidelity remains robustly above the classical threshold for bipartite channels derived from W-class states but not for those derived from GHZ states.
This paper utilizes the post-Newtonian multipolar-post-Minkowskian formalism within scalar-tensor theories to compute tidal corrections to the total energy flux and waveform phasing of neutron star binaries up to 2PN and 1.5PN orders, respectively, while accounting for gravitational, scalar, and mixed tidal deformability effects essential for interpreting future high-precision gravitational wave data.
This paper demonstrates that sustaining a constant electric field in de Sitter space necessitates a tachyonic photon mass, which, when incorporated into an on-shell renormalization scheme, resolves previous infrared divergences by yielding a finite, positive Schwinger current for both charged fermions and scalars.
The paper demonstrates that all physically viable models of New General Relativity, including TEGR and the Hayashi-Shirafuji model, inevitably exhibit divergences in torsion scalars at local horizons, thereby obstructing their interpretation as valid black hole configurations.
This study employs a hierarchical Bayesian framework to analyze simulated gravitational wave data from binary neutron star mergers, demonstrating that a linear logarithmic relation between tidal deformability and quadrupole moment is sufficient for future measurements and can constrain the characteristic length of dynamical Chern-Simons modified gravity to 10 km or less.
This paper resolves thermodynamic ambiguities in four-dimensional charged de Sitter black holes by adopting a Bousso-Hawking normalization relative to a freely-falling observer, revealing that while the near-extremal Nariai limit avoids a breakdown of the semi-classical description due to finite heat capacity, fundamental statistical limitations persist in the cold and ultracold regimes where the heat capacity vanishes.
This paper extends a previously developed generally covariant formalism to incorporate the diffusion of conserved charges, while clarifying the apparent distinction between chemical potential and diffusion terms.