439 papers
This paper proposes an AdS/NCFT duality where networks are holographically described by branched spacetimes with "Net-branes," demonstrating how junction conditions enforce energy conservation, deriving gravitational spectra and entanglement properties, and linking network complexity to bulk geodesics.
This study investigates neutron stars admixed with finite-temperature Bose-Einstein condensate dark matter, finding that even modest dark matter fractions reduce stellar mass, radius, and tidal deformability, thereby shifting theoretical predictions to better align with GW170817 observations depending on the underlying nuclear equation of state.
This paper proposes a SM model based on an extension of the Standard Model that simultaneously explains the observed dark matter relic abundance through freeze-in production of a singlet fermion and the baryon asymmetry via leptogenesis, while also generating light neutrino masses through the type-I seesaw mechanism.
By unifying 104 localized fast radio bursts and 47 gravitational-wave events, this study presents an -free measurement of the cosmic baryon density fraction () that aligns with early-Universe observations and offers a robust late-Universe probe to address the tension and missing baryon problem.
This paper investigates whether small dark matter clumps passing near Earth could generate the gravitational-wave glitches observed in LIGO/Virgo/KAGRA data, finding that while most glitches are inconsistent with this hypothesis, the analysis establishes the first direct upper limits on the local over-density of such dark matter clumps.
This paper investigates multi-field cosmological models that break diffeomorphism invariance down to transverse diffeomorphisms, demonstrating how the resulting non-conservation of individual energy-momentum tensors facilitates an effective energy exchange between fields that offers new phenomenological insights into the dark sector.
This paper investigates particle creation during non-singular gravitational collapse where quantum gravity induces a bounce, demonstrating that the resulting spontaneous emission probability deviates from standard Hawking radiation and implies a non-thermal spectrum, while also suggesting this process could resolve shell crossing singularities.
This paper constructs complete families of regular, asymmetric wormhole solutions in Einstein-Dirac-Maxwell theory that connect two identical Minkowski spacetimes, demonstrating that their physical properties, including the possibility of negative ADM mass, are fully determined by the throat parameter, spinor frequency, and coupling constant.
This paper proposes a background-independent quantum framework that describes a system's state relative to a quantum reference frame (such as a clock) via entangled states and Ricci-flat Kaehler-Einstein equations, recovering standard quantum mechanics in the non-relativistic limit while naturally incorporating inertial forces and offering a geometric fiber bundle interpretation.
This paper investigates a two-qubit SWAP thermal machine utilizing inertially moving Unruh-DeWitt detectors coupled to thermal quantum fields, deriving relativistic thermodynamic uncertainty relations that reveal motion-induced violations of classical bounds and performance enhancements beyond standard Carnot limits.
By computing the spacetime metric of a compact-object scattering system using perturbative QFT techniques, this paper demonstrates that nonlinear, long-range interactions cause a significantly stronger breakdown of Sachs's peeling property and asymptotic simplicity than previously recognized.
This paper demonstrates that embedding natural inflation within Palatini gravity, specifically with the model where $7/4 \lesssim n \leq 2n > 2$ fail to provide comparable improvements.
This paper demonstrates that environmental decoherence during inflation induces a "cosmic lockdown" via the quantum Zeno effect, which suppresses quantum tunneling and stabilizes false-vacuum occupation for light scalar fields by locking them into stochastically selected local minima.
This paper derives a bigravity model from noncommutative geometry that survives the commutative limit, featuring a gauge connection and two tetrads with ghost-free interaction terms, and analyzes its cosmological solutions which split into two distinct branches with unique curvature and constraint properties.
This paper proposes that a massless, light-speed collective mode analogous to second sound in a two-fluid hydrodynamic model of de Sitter thermodynamics represents a massless graviton, thereby offering a new perspective on the ambiguous nature of gravitons in de Sitter spacetime.
This paper investigates the resonant excitation of supermassive black hole modes by nearby stellar-mass binaries, revealing that the resulting energy flux peaks at frequencies slightly offset from the black hole's quasinormal modes—a shift that increases with orbital distance—and that rotating black holes exhibit more complex, less damped, and harder-to-interpret resonant responses.
This paper investigates the absorption and scattering of massless scalar waves by Frolov black holes using null-geodesic and partial-wave analyses, revealing that high-frequency scattering patterns are primarily governed by the unstable photon orbit and exhibit strong similarities to other regular black hole models when critical impact parameters are matched.
This paper demonstrates that peculiar velocities grow significantly faster in general relativity than in Newtonian gravity because relativistic theory accounts for the gravitational contribution of kinetic energy (peculiar flux), a factor absent in standard Newtonian treatments, thereby offering a potential explanation for observed large-scale bulk flows that challenge the CDM model.
This paper proposes a quantum-gravitational solution to the cosmological constant problem by utilizing Schwarzian theory and ensemble averaging of time-reparametrization modes to derive the observed dark energy density and its equation of state.
This paper demonstrates that environmental phase modulation in gravitational-wave signals, such as those caused by hierarchical triple motion, can be detected in a template-free manner using time-frequency trajectory statistics, with detection performance governed by a universal scaling law where the product of cumulative phase distortion and signal-to-noise ratio determines observability.