376 papers
This paper reviews and elaborates on the transformation of the dilaton under target space duality, demonstrating that the standard one-loop transformation law requires modification at two-loop and higher orders, a finding illustrated through time-dependent cosmological solutions.
This paper investigates a quantum-corrected black hole without Cauchy horizons, demonstrating that the quantum parameter causes an outward migration of stable orbits, induces cumulative phase shifts in gravitational waveforms, and suppresses the radiative efficiency of accretion disks, thereby offering distinct observational signatures to differentiate such geometries from classical black holes.
This paper derives an exact black hole solution in Eddington-inspired Born-Infeld gravity surrounded by perfect fluid dark matter, analyzing how model parameters affect the event horizon and demonstrating the high sensitivity of stable circular orbits to the system's coupling constants.
This paper investigates how low-frequency gravitational waves coupled with electromagnetic waves propagate through rarefied gases and cold magnetized plasmas, demonstrating that under specific conditions, these coupled waves can achieve amplitudes comparable to those of transverse gravitational waves from external astrophysical sources.
This paper proposes a string field theory for branched polymers with loops coupled to the critical Ising model, demonstrating that its non-perturbative partition function satisfies a third-order linear differential equation and a Wheeler-DeWitt equation derived via both matrix model loop equations and stochastic quantization.
This paper extends ray-tracing techniques to analyze head-on collisions of non-spinning hairy black holes in Einstein-scalar-Gauss-Bonnet gravity, finding that while most coupling functions prolong the merger duration compared to general relativity, an exponential coupling can shorten it, with both merger duration and area increment generally tracking the behavior of the small black hole's photon ring.
This paper demonstrates that rotating Kerr black holes endowed with synchronized scalar hair significantly alter the orbital structure and observable appearance of thin accretion disks, particularly for counter-rotating configurations, thereby providing robust observational diagnostics for testing tensor-multi-scalar gravity through future horizon-scale imaging.
This paper demonstrates that extreme-mass-ratio inspirals around supermassive bosonic dark matter stars can produce gravitational-wave signals that closely mimic black hole binaries due to scalar dissipation, yet remain distinguishable by future space-based detectors like LISA through specific phase dephasings driven by the central object's compactness.
This paper demonstrates that while the self-similar photon ring structure of a Kerr black hole persists in phase space without exhibiting chaos, deforming the spacetime away from the Kerr geometry induces chaotic dynamics near resonant bound orbits, resulting in a fractal phase-space structure encoded in the first-return map.
This paper presents a strong-deflection expansion for the light deflection angle near a degenerate photon sphere in static, spherically symmetric spacetimes, deriving a unique leading power-law term whose coefficient factorizes into a universal constant and a local geometric factor expressible via tidal measures or null-energy density profiles.
This paper proposes a new covariant symplectic structure and boundary conditions at spatial infinity that extend the BMS algebra to include regular log-translations and log-supertranslations, yielding finite conserved charges with a central extension and revealing novel physical information for future observables at null and timelike infinity.
This paper establishes a new hierarchy of pointwise inequalities among curvature invariants across various Petrov and Segre types in arbitrary dimensions, specifically demonstrating how higher-order invariants like the Zakhary–McIntosh scalars are algebraically bounded by lower-order quantities such as the Kretschmann scalar.
This paper proposes a geometric framework where both metric and torsional degrees of freedom dynamically emerge from spinor currents via a massive rank-three field, resulting in a propagating torsion that allows spinless particles to indirectly sense spin through an effective metric and admits topologically non-trivial configurations in the Majorana limit.
This paper investigates singular local gauge transformations in Einstein-Maxwell spacetimes that map timelike and spacelike tetrad vectors onto the light cone, establishing a direct link between electromagnetic gauge groups and tetrad transformations on orthogonal eigenvector planes of the stress-energy tensor.
This paper investigates the thermodynamic and optical properties of charged black holes surrounded by a cloud of strings within bumblebee gravity, analyzing how Lorentz-violating effects modify standard General Relativity predictions and providing observational constraints through black hole shadows and Solar System tests.
This study quantitatively analyzes asymmetric tidal perturbations on the LARES 2 and LAGEOS satellites by identifying 83 significant Earth tide constituents and demonstrating that the cumulative effect of the remaining minor constituents is non-negligible, thereby providing essential parameters for high-precision orbital dynamics and fundamental physics tests like the Lense-Thirring effect.
This paper demonstrates that an -corrected tachyonic scalar field inflation model with a rescaled Einstein-Hilbert term can successfully achieve a phantom divide line crossing and remain compatible with ACT data, provided the effective gravitational constant during inflation is stronger than standard Einstein-Hilbert gravity.
This paper establishes that perturbative unitarity in de Sitter spacetime, analyzed via momentum-space entanglement and purity in two-scalar models, imposes an upper bound on field-space curvature of the order of the Hubble scale—a constraint arising from the spacetime's thermal nature that complements traditional flat-space bounds.
This paper presents a dark fluid model described as a non-viscous, non-relativistic, rotating, and self-gravitating fluid with spherical symmetry and a polytropic equation of state, which is solved using a self-similar time-dependent ansatz to derive new solutions consistent with the Newtonian cosmological framework that can describe the transition from normal matter to dark energy on cosmological scales.
Using the effective field theory of inflationary fluctuations, this paper explicitly proves for the first time that the renormalized one-loop power spectrum of the primordial curvature perturbation freezes exactly on super-horizon scales, thereby confirming the quantum-level validity of the conservation law essential for inflationary predictions.