444 papers
This paper demonstrates that fractional Newtonian cosmology naturally yields a non-singular early universe transitioning into a stable inflationary phase, which resolves the horizon problem and provides a graceful exit to a radiation-dominated era through a specific relationship between the number of e-folds and the fractional parameter.
This paper reports the results of a directed search for continuous gravitational waves from unknown neutron stars in five Milky Way globular clusters using LIGO-Virgo-KAGRA data from the first eight months of the fourth observing run, finding no detections but setting the most sensitive upper limits to date across most of the explored parameter space.
This paper presents a loop quantization of the marginally bound Lemaître-Tolman-Bondi dust model, demonstrating that the classical central singularity is resolved by a quantum bounce at Planckian densities, while also revealing that interference patterns in the wave function near the bounce limit the accuracy of effective loop quantum gravity theories compared to the full quantum dynamics.
This paper evaluates the observational viability and thermodynamic implications of Gong-Zhang dark energy parametrizations using late-time cosmological data, finding that the GZ-Type II model offers a competitive, physically transparent alternative to CDM with reduced parameter degeneracy and is further validated by configuration entropy analysis as a diagnostic of late-time cosmic acceleration.
This study investigates how external magnetic fields around massive black holes imprint specific post-Newtonian corrections on gravitational waveforms during inspiral, demonstrating that while these magnetic effects are distinct from modified gravity theories, they are observationally degenerate with the gravitational influence of surrounding matter distributions.
This paper proposes and forecasts that an optomechanical scheme using two levitated nanospheres can significantly improve laboratory constraints on symmetron dark energy by detecting interaction-induced resonance splitting, potentially surpassing existing bounds by several orders of magnitude.
This paper demonstrates that accretion disk perturbations, modeled as a weak external tidal field, significantly alter Kerr black hole superradiance by inducing state mixing and energy shifts that can suppress, quench, or enhance gravitational atom growth, thereby critically impacting the detectability of ultralight bosons in realistic astrophysical environments.
This paper proposes that including third-order gravitational waves within the scalar-induced gravitational wave framework can enhance the spectral amplitude of the PTA signal, thereby alleviating the theoretical tension of primordial black hole overproduction while maintaining consistency with cosmological constraints and supermassive black hole binary backgrounds.
This paper employs Lie Symmetry Analysis and Noether Point Symmetry methods to derive the symmetry generators and conserved quantities of the Einstein vacuum field equations, thereby offering a novel reformulation of Birkhoff's Theorem.
This paper demonstrates that future space-based gravitational wave detectors like LISA can use extreme mass-ratio inspirals involving braneworld black holes with tidal charges to place significantly stronger constraints on extra dimensions than current black hole shadow or ground-based observations.
This paper establishes a relative Poincaré–Verdier duality for supermanifolds via Berezin fiber integration to rigorously define picture changing operators and prove the equivalence of component, superspace, and geometric formulations of 3d supergravity.
This paper investigates the relationship between non-local magic and entanglement in quantum many-body systems, establishing bounds on classical simulation hardness and conjecturing a linear scaling in conformal field theories, while proving that in holographic duals, non-local magic vanishes precisely when gravitational back-reaction is absent and is approximately equal to the rate of change of minimal surface area with respect to cosmic brane tension.
This paper investigates the cosmological viability of a specific gravity model by constraining its parameters using MCMC simulations on combined observational Hubble, supernova, and large-scale structure datasets, ultimately comparing its ability to explain late-time accelerated expansion and cosmic structure growth against the standard CDM model.
This paper resolves the issue of general covariance in spherically symmetric effective quantum gravity by deriving necessary conditions for the effective Hamiltonian constraint, leading to two new quantum-modified black hole models that overcome limitations found in previous works.
This paper derives a new covariant effective Hamiltonian constraint in spherically symmetric quantum gravity that resolves the classical singularity into a Schwarzschild-de Sitter region with negative mass, thereby eliminating the Cauchy horizons typically found in previous models.
This paper investigates the quantum transition between Schwarzschild and string black holes in the large limit by reducing the problem to two dimensions via T-duality, deriving the Wheeler-De Witt equation to treat the geometries as distinct wave function states, and calculating the transition probability driven by string coupling.
This paper demonstrates that the proposed quantum-optical multimode mixer model for gravitational redshift is only valid to first order under specific conditions and offers a partial solution requiring a transformation matrix with auxiliary modes at least equal in number to the photonic state modes.
This paper proposes a method to derive the Bekenstein-Hawking entropy of extremal black holes by calculating the entanglement entropy of disconnected one-dimensional conformal quantum mechanics systems, thereby demonstrating that horizon entropy fundamentally originates from quantum entanglement.
This paper presents a perturbative framework for incorporating the effects of dark matter spikes around supermassive black holes into first post-adiabatic order gravitational waveform modeling for extreme mass-ratio inspirals, thereby enabling the use of these systems as precise probes of dark matter distribution.
This paper demonstrates that the modified gravity theory, through a non-minimal matter-curvature coupling, allows for stable super-Chandrasekhar white dwarf configurations and uses Bayesian inference with observational data to constrain the coupling parameter .