3255 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 demonstrates that in gravity theories, a generic nonminimal coupling dependent on the kinetic term induces a transverse heat flux component that obstructs a standard Eckart fluid interpretation of the scalar sector, thereby proving that such an interpretation is only globally valid if the coupling depends solely on the scalar field .
This paper identifies a subpopulation of hierarchical black hole mergers in gravitational-wave data and proposes that their steeply increasing merger rate with redshift explains the observed broadening of the effective spin distribution over cosmic time.
This paper constructs and analyzes singly and doubly spinning non-supersymmetric F1-P black ring solutions in five-dimensional supergravity, demonstrating that the doubly spinning configuration admits an extremal limit where the entropy satisfies the relation .
Through extensive time-domain numerical simulations of a Schwarzschild black hole in a cubic-in-curvature effective-field-theory extension of general relativity, this paper demonstrates that while the loss of isospectrality between polar and axial quasinormal modes complicates the identification of individual fundamental modes in gravitational waveforms, it can still provide evidence for non-general-relativistic physics.
This paper demonstrates that regularizing (2+1)-dimensional Minkowski spacetime with a finite-resolution Gaussian probe induces a curved geometry featuring a topological defect with universal negative energy, revealing that finite spatial resolution fundamentally shapes spacetime structure rather than merely smoothing singularities.
This paper proposes a novel cosmological model where the Big Bang singularity is replaced by a smooth boundary in a purely Riemannian four-dimensional space, from which Lorentzian patches emerge via a signature change induced by a clock field, potentially creating a "Euclidean sea" containing expanding universe islands like our own.
This paper investigates the emergence and detection of Hawking radiation in a quenched 1D chiral spin chain by mapping its dynamics to a curved spacetime Dirac fermion, revealing that while the radiation spectrum exhibits greybody-like deviations, a weakly coupled qubit detector can faithfully measure the Hawking temperature, whereas strong coupling obscures the thermal signature by thermalizing with the global environment.
This paper investigates self-resonance preheating in deformed -attractor T-models with a Gaussian potential feature, revealing that while the initial energy transfer remains largely unaffected, the feature significantly alters post-resonance dynamics by producing a larger number of smaller, shorter-lived oscillons and modifying the high-frequency gravitational wave spectrum.
This study employs Bayesian simulations and nonparametric population modeling to demonstrate that while current gravitational-wave catalogs (GWTC-4) do not yet guarantee a confident detection of the pair-instability supernova mass cutoff, future observing runs will significantly improve constraints on the cutoff mass and the underlying reaction rate, provided that rigorous predictive tests are used to validate astrophysical claims.
This paper demonstrates that the motion of a charged spinning test particle in a electromagnetic background admits two additional hidden constants of motion, analogous to the Carter and Rüdiger constants, if and only if the particle's multipole structure is constrained by specific Wilson coefficients corresponding to the spin-exponentiation of effective Compton amplitudes up to second order in spin.