482 papers
This paper demonstrates that a lunar laser interferometer can directly probe the kinetic sector of the effective field theory of dark energy by measuring horizon-scale metric fluctuations, thereby enabling constraints on the dark energy sound speed and kinetic operators that are inaccessible to traditional background expansion probes.
Employing the STOchastic LAttice Simulation (STOLAS) code, this study investigates the spatial profiles and topological structures of curvature perturbations in multi-waterfall hybrid inflation models, validating the stochastic-N algorithm while revealing how stochastic noise drives defect reconnection and imposes upper bounds on perturbations in cubic potential scenarios.
The authors construct and classify asymptotically flat dyonic hairy black hole solutions in U(1) gauge-invariant scalar-vector-tensor theories with cubic and quartic interactions, demonstrating that magnetic charge activates specific interaction sectors to generate new solution branches and requires consistency conditions to ensure the field equations remain second-order.
This paper presents a scalar-Gauss-Bonnet theory with a cubic coupling where competing curvature-induced and spin-induced scalarization mechanisms coexist, leading to a strong violation of black-hole uniqueness by admitting multiple distinct black-hole solution branches for the same mass and spin.
This paper constructs a renormalization-group improved Schwarzschild black hole geometry using exact Scheme B running, demonstrating that quantum corrections regularize the central singularity, induce nontrivial thermodynamic phase structures with stable remnants, and shift critical points while preserving the global topological number of the solution.
This paper derives a canonical quantisation-based Worldline Quantum Field Theory formalism suitable for both scattering and bound configurations of the classical two-body problem, utilizing the Magnus expansion to compute matrix elements that encode physical observables.
Using an analogue gravity model on a spacetime with a naked singularity, the authors derive exact electromagnetic solutions that remain regular and demonstrate the possibility of transmitting power flux across the singularity.
This paper demonstrates that within a general class of gravity models, particularly the Starobinsky model, the positive values of the scalar field arising from the conformal transformation provide an additional suppression mechanism for the massless modes of higher-rank antisymmetric tensor fields, thereby explaining their observational absence in the present universe.
This study utilizes combined cosmological datasets (BAO, CC, SNIa, and growth rate data) to constrain viscous fluid models within various gravity frameworks, finding that while exponential and logarithmic models are statistically rejected, the non-viscous power-law model remains a robust alternative to CDM.
This paper employs the Lanczos algorithm to investigate Krylov complexity in the early universe as an open system across inflation, radiation, and matter domination epochs, revealing distinct dissipative behaviors, the similarity of complexity evolution across various inflationary potentials, and deriving new evolution equations for squeezing parameters via Meixner polynomials to demonstrate rapid decoherence-like effects.
This paper reviews the unique data analysis challenges of the Taiji space-based gravitational wave mission and introduces the Taiji Data Challenge II alongside the open-source Triangle toolkit, which together provide a high-fidelity simulation platform to bridge the gap between theoretical objectives and realistic detection pipelines.
This paper proposes a novel mechanism called Magnetically Arrested Transmutation (MAT), wherein strong magnetic fields in compact stars halt the accretion of endoparasitic black holes formed by dark matter, thereby explaining the over-representation of magnetic white dwarfs and the unique presence of magnetars near the Galactic center.
This paper investigates ghost-free cubic Poincaré gauge gravity within flat FLRW cosmology, demonstrating that its new dynamical degrees of freedom lead to faster expanding universes with matter content estimates consistent with the standard model across two distinct hypermomentum conservation scenarios.
This paper presents an improved binary black hole search discriminator that utilizes singular value decomposition of real non-Gaussian noise transients to construct a statistic, demonstrating performance comparable to sine-Gaussian-based methods while offering a more direct approach for modeling complex glitches.
This paper investigates how dark matter-driven dynamical friction affects eccentric binary pulsars embedded in ultralight scalar fields, demonstrating that orbital eccentricity significantly amplifies these environmental imprints and enhances the systems' potential as sensitive probes for dark matter signatures.
Through -body simulations, this study critically assesses claims that dark matter spikes explain anomalous period decays in three low-mass X-ray binaries, ruling out previously proposed shallow profiles and establishing that significantly steeper density slopes () are required to account for the observed orbital evolution.
This paper demonstrates that the semiclassical Einstein equations naturally emerge from the proportionality between quantum relative entropy and horizon area variations, thereby generalizing Jacobson's thermodynamic derivation by replacing classical entropy with well-defined quantum information measures.
This paper demonstrates that a spontaneous quantum collapse model, constrained by Planck 2018 data, successfully explains the origin of primordial cosmic structures and the low- CMB power anomaly while simultaneously eliminating the problem of eternal inflation.
This paper demonstrates that stochastic gravitational wave memory from early universe and astrophysical sources exhibits a fractional Brownian motion scaling ( with ) that grows faster than standard Brownian motion, offering a distinct signature to extract these signals from PTA data and probe post-Big Bang conditions.
This paper presents a numerically stable and flexible framework for simulating decoherence in multifield inflationary models by implementing open-system effects via the Lindblad equation, enabling the study of primordial scalar perturbations without relying on the slow-roll approximation and facilitating compatibility with nonlinear numerical codes.