453 papers
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 .
This paper details the first calculation of the effective source required for second-order gravitational self-force computations on quasicircular orbits in Schwarzschild spacetime, validating its various components through analytical and numerical tests to support post-adiabatic gravitational-waveform modeling.
This paper proposes a novel quasi-topological gravity model that unifies cosmological and black hole scenarios by replacing spacetime singularities with a "big bounce" and a "black bounce," respectively, thereby reproducing key results from loop quantum cosmology and the quantum Oppenheimer-Snyder model within a single, manifestly covariant framework.
This paper investigates the causal structure and interior geometry of asymptotically AdS black holes containing vacuum bubbles by analyzing holographic entanglement entropy and bulk-cone singularities, revealing that while collapsing and expanding bubbles exhibit thermalization, static bubbles display non-thermal "scar state" properties.
This paper generalizes Carrollian Lie algebroids to the framework of -commutative (almost commutative) geometry via -Lie-Rinehart pairs, establishing foundational analogues for Carrollian structures and demonstrating their application through explicit constructions on the extended quantum plane and the noncommutative 2-torus.
This paper demonstrates that incorporating quantum fluctuations via Jackiw-Teitelboim (JT) gravity in a holographic model of near-extremal black branes generates a non-universal, temperature-dependent shear viscosity to entropy ratio () that dips below the KSS bound in the semi-classical regime before rising above it at lower temperatures, a result that aligns with the quantum-corrected absorption cross-section.
This paper proposes constructing local gauge invariant operators on isometry-breaking backgrounds via the Stückelberg mechanism—effectively introducing physical clocks and rods—but argues that suppressing the resulting spacetime fluctuations to reliably define operators in localized regions (such as black hole islands) requires strong isometry breaking, potentially achieved through transitions to higher-dimensional black holes.
This paper demonstrates that Newtonian gravity can generate quantum entanglement between mesoscopic bodies only when the gravitational tidal field is quantized (as in the mini-superspace framework), whereas models treating the field as classical (semiclassical and stochastic gravity) fail to produce such entanglement.
This paper proposes a new definition of Horndeski theory based on closure under invertible pure disformal transformations and the inclusion of minimal Horndeski theory, which successfully recovers the standard single-field action and provides a practical framework for constructing multi-field extensions that encompass known antisymmetric structures.
This paper analytically and numerically solves the geodesic equations for null rays traversing the ring singularity of maximally extended Kerr spacetime to characterize the inner throat and forbidden polar bands, ultimately constructing simulated views for observers in the negative- domain that reveal strong image distortion and inversion.
This paper addresses the previously unexamined issue of volume divergences in the measure for Quadratic Gravity, demonstrating that these divergences cancel in the extremal limit similar to General Relativity, while also reviewing the complexities of renormalization in curved space and the conditions under which non-invariant measures can be justified.
This paper investigates the shadows of rotating traversable wormholes in the Teo class, demonstrating that a variable redshift parameter induces a universal critical value leading to cuspy structures and revealing four distinct shadow morphologies that could serve as observational diagnostics for compact objects.