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.
Using the latest DESI DR2 BAO data combined with other cosmological probes, this study finds that both flat and non-flat DGP models are strongly disfavored and fail to resolve the Hubble tension, as they predict a significantly lower Hubble constant than the Planck CDM value.
This paper establishes the nonlinear stability of the Einstein-de Sitter universe by proving that initial data sets with near-flat metrics and positive fluid energy density on converge to a flat metric under the Einstein-Euler flow with a polytropic equation of state, thereby confirming that the model can be stable for an appropriate matter description despite its known linear instability under pressureless conditions.
This paper presents a geometric time-delay interferometry framework for subtracting clock noise in space-based gravitational-wave detectors, demonstrating through simulations that this method effectively suppresses noise residuals and significantly improves parameter estimation accuracy for future missions like LISA.
This paper investigates and compares the quantum circuit and Krylov complexities of primordial curvature perturbations in canonical scalar-field inflation versus the modified gravity model, revealing that while the latter enhances squeezed strength and leads to a smaller growth in Krylov complexity, it induces a more pronounced evolution in circuit complexity, particularly after horizon exit.
This paper demonstrates that in scalar field theories with degenerate vacua, the vacuum-dependent scalar field mass induces an anisotropic emission of radiation from domain walls, creating a "rocket effect" that biases their evolution toward the lower-mass vacuum and accelerates network decay, a mechanism distinct from and more dominant than potential barrier asymmetries.
This paper presents a numerical relativity study using Bowen-York-inspired initial data to simulate head-on collisions of boson stars and boson star-black hole encounters, revealing that while boson star collisions emit more gravitational wave energy than black hole binaries, their collisions with black holes radiate less.
This paper analyzes how quantum reference frame transformations, which account for the fluctuations and entanglement of the reference frame itself, alter the values of observables for a fixed state, successfully utilizing the concept of noncommutative values to describe these changes in both continuous and discrete quantum systems.
This paper establishes an exact quantum observable analog of the weak equivalence principle for relativistic quantum particles within the Heisenberg picture by deriving quantum geodesic equations from Hamiltonian evolution, while exploring their implications for projective measurements, noncommutative geometry, and a quantum gravity framework based on quantum coordinate transformations.
This paper develops a formalism for quantum mechanics in curved spacetime using a noncommutative geometric perspective and the Heisenberg picture to derive mass-independent quantum geodesic equations and a potential quantum Einstein equation, arguing that this approach is superior to the traditional Schrödinger wavefunction representation.
This paper constructs a traversable wormhole within the conservative gravity framework, demonstrating that the theory's conservation requirements necessitate a linear dependence on the energy-momentum tensor trace and allow for solutions that do not require exotic matter for specific parameter ranges.