439 papers
This paper demonstrates that negative dilaton hair in rotating Einstein-Maxwell-Dilaton-Axion black holes significantly enhances energy extraction efficiency and the rotational energy reservoir while expanding the parameter space for wave superradiance and preserving the Bañados-Silk-West divergence in particle collisions compared to standard Kerr black holes.
This paper utilizes the unitary irreducible representations of the infinite-dimensional asymptotic symmetry groups of QED and gravity to encode universal infrared features of scattering processes and explores the construction of an infrared-finite -matrix by studying supermomentum eigenstates in contrast to the dressed-state approach.
By expanding curvature tensors and recasting classical energy conditions as inequalities on metric perturbations, this study demonstrates that enforcing the strong, weak, null, and dominant energy conditions on a Schwarzschild background imposes significant angular restrictions on BMS supertranslations, thereby substantially reducing the space of physically admissible transformations despite their formal infinite dimensionality.
This study uses 3D simulations to demonstrate that while binary mergers of bosonic dark matter cores consistently produce stable solitonic remnants, the final mass retention is non-universal and critically depends on whether repulsive or attractive self-interactions are present, whereas the inclusion of an ideal gas component modifies the gravitational background without altering the intrinsic scaling of the bosonic core.
This paper demonstrates that geometric observables, such as length, measured by different inertial observers in Minkowski spacetime do not generically Poisson commute, a finding that offers significant insights into the potential existence of a fundamental scale in quantum gravity.
This paper demonstrates that machine learning techniques, particularly gradient-boosting algorithms like XGBoost, can effectively classify and disentangle overlapping populations of stellar remnant binaries in simulated LISA data, achieving high recall rates for double white dwarf and high-mass systems while significantly outperforming statistical methods in identifying challenging neutron star-white dwarf binaries.
This paper utilizes a covariant spinor moving frame quantization of type IIA and IIB superparticles to reveal a hidden symmetry in linearized supergravity, demonstrating that both theories can be described by identical analytic on-shell superfields and superamplitudes while highlighting specific challenges in extending this formalism to include D0-branes.
This paper argues that the formation of a Schwarzschild black hole from a non-singular configuration cannot occur as a continuous process, as the geometry inevitably develops a "Minkowski breaking" discontinuity and curvature singularities before the point source forms, implying that black hole emergence requires a noncontinuous, possibly quantized, framework.
This paper presents a rigorous Wheeler-DeWitt scattering formulation of the Quantum Big Bounce for a closed isotropic universe with an ekpyrotic potential, demonstrating that while a LQC-like scenario requires regularization due to high-energy divergences, an ekpyrotic scenario with reversed internal time flow remains well-posed at all energy scales, thereby avoiding the cosmological singularity within standard quantum mechanics.
This paper proposes and benchmarks a hybrid quantum-classical algorithm that iteratively simulates real-time dynamics of quantum fields coupled to classical fields to achieve self-consistent semiclassical backreaction, demonstrating its convergence and robustness in scalar-tensor modified gravity models relevant to cosmology.
This paper critiques a 2025 study by Ballardini et al. for incorrectly calculating third-order slow-roll corrections due to improper integration techniques, demonstrating through numerical Monte-Carlo methods that the original exact analytical results by Auclair and Ringeval remain valid.
This paper constructs a class of higher-dimensional asymptotically AdS black holes whose interiors exhibit bona fide chaotic BKL dynamics characterized by billiard-like motion in a -simplex, revealing new era structures for and a holographic thermal -function that tracks these epoch transitions.
This paper extends the study of peeling properties for scalar fields to Dirac fields on Kerr spacetimes by combining Penrose conformal compactification with geometric energy estimates to define peeling via Sobolev regularity near null infinity and establish optimal initial data spaces, confirming that decay and regularity assumptions in Kerr yield the same regularity across null infinity as in Minkowski space for all angular momentum values.
This paper establishes the peeling property for tensorial Fackerell-Ipser and spin Teukolsky equations on Schwarzschild spacetime by combining conformal compactification with vector field techniques to derive energy estimates and determine optimal initial data ensuring asymptotic decay along radial geodesics.
This paper proposes a general scheme for reconstructing bulk geometric quantities in static pure AdS space by establishing that the density of partial entanglement entropy (PEE) threads is constant, thereby reformulating the Ryu-Takayanagi formula as a geometric counting of thread intersections that aligns with the Crofton formula.
This paper demonstrates that thin accretion disks can induce significant tidal Love numbers in black holes, potentially masking modified gravity effects and limiting tests of black-hole mimickers, while also showing that next-generation gravitational wave detectors like LISA and the Einstein Telescope could precisely measure these environmental tidal parameters.
This paper establishes a systematic framework for relational dynamics relative to periodic clocks in both classical and quantum theories, demonstrating the equivalence of three distinct quantization approaches, identifying limitations in the original Page-Wootters formalism for continuous spectra, and clarifying how periodic evolution with respect to one clock can coexist with monotonic evolution relative to another.
This paper translates current bounds on axion-like particle (ALP) photon couplings into constraints on the Randall-Sundrum model's extra dimension size, revealing that such constraints fail to resolve the gauge hierarchy problem for light ALPs and necessitate a massive ALP ( GeV) to be relevant.
This paper utilizes joint cosmological observations to demonstrate that including a negative cosmological constant (AdS vacuum) in the dark energy sector provides a theoretically motivated mechanism that opens a finite non-phantom region in the Chevallier-Polarski-Linder parameter space while remaining consistent with current data and linking dark energy phenomenology to quantum gravity.
This paper demonstrates that accurate parameter estimation for massive black hole binaries in the LISA band requires ringdown templates to include a specific minimum number of modes (ranging from 3–6 for typical systems to over 10 for high-SNR events) to prevent systematic biases caused by waveform truncation.