530 papers
This paper derives a model-independent upper limit on the amplitude of a chiral gravitational wave background produced before the electroweak epoch, which, for high reheating temperatures, provides a significantly more stringent constraint than standard big bang nucleosynthesis bounds at frequencies above the MHz scale.
This paper establishes three distinct representations for the flat space wavefunction derived from a graph , proving their correctness by linking the wavefunction to the canonical form of the cosmological polytope and confirming a conjecture regarding its partial fraction decomposition in terms of connected subgraphs.
This paper argues that the Wilson-Fisher fixed point at integer dimensions is not identical to the critical Ising model but rather contains it as a subsector, a conclusion supported by the analysis of negative operator multiplicities in the model and the incompatibility of a literal equality with emergent Virasoro symmetry in two dimensions.
This paper constructs and analyzes the stability of electron star solutions in asymptotically global AdS spacetime to model a holographic metal in a finite volume, revealing a phase diagram organized around a quantum critical point at finite chemical potential.
This paper proposes and verifies a correction to an elliptic block in the 2d superconformal field theory NS sector by analyzing the 4-point block in pillow geometry and confirming the result through crossing symmetry checks in super Liouville theory and comparisons between - and -recursion methods.
Motivated by string T-duality, this paper constructs a nonsingular "black bounce" spacetime that interpolates between regular black holes and traversable wormholes, demonstrating its thermodynamic stability, phase transitions, and consistency with Event Horizon Telescope observations while identifying the specific energy conditions violated by the underlying effective fluid.
This paper presents a systematic study of the continuum spectrum of spherical multi-frequency Proca stars, demonstrating that they interpolate between discrete stationary states and that a subset of these configurations are linearly stable, with potential implications for determining particle spin in ultralight dark matter models.
This paper resolves the inability of staggered-fermion discretizations to support topological phases in (2+1)D Hamiltonian lattice QED by demonstrating that Wilson fermions naturally enable nontrivial topological regimes with nonzero Chern numbers, which are characterized through gauge-invariant diagnostics and exact diagonalization to provide a foundation for near-term quantum simulations.
This paper establishes rigorous bounds demonstrating that the classical simulability of quantum operators via matrix-product operators is determined by the scaling of their local-operator entanglement, where logarithmic growth of Rényi entropies for guarantees efficient approximation while volume-law scaling for precludes it.
This paper investigates vacuum Cherenkov radiation induced by nonminimal dimension-5 isotropic Lorentz-violating operators in the fermion sector and utilizes ultra-high-energy cosmic ray data to establish stringent constraints on the corresponding quark coefficients.
This paper refutes claims that fourth-order scalar fields can solve the cosmological constant problem or generate primordial density perturbations without inflation, arguing instead that such theories inherently suffer from fatal pathologies including ghost-induced instabilities, unitarity violations, and the generation of a confining fifth force.
This paper proposes a unified framework demonstrating that the structural difference in decoherence—specifically, the preservation of coherence within the lowest phonon-number manifold by a quantized graviton bath versus its inevitable destruction by a classical stochastic gravitational field—provides an operational criterion for distinguishing the quantum or classical nature of gravitational waves using mesoscopic optomechanical systems.
This paper derives exact one-loop QED effective actions for scalar and spinor fields in global (anti-)de Sitter spacetime under a uniform electric field by utilizing the in-out formalism and Bogoliubov coefficients, revealing a strong interplay between electric fields and spacetime curvature while recovering known limits in pure (A)dS and Minkowski spaces.
This paper proposes an improved Two Higgs Doublet Model derived from six-dimensional gauge theory compactified on an orbifold, where the inclusion of brane-localized gauge kinetic terms naturally enforces CP conservation and symmetry at tree level while allowing for the generation of soft symmetry-breaking masses and the Standard Model Higgs mass at the one-loop level.
This paper demonstrates that even at very small centripetal accelerations, circular motion intrinsically and anisotropically modifies the Lamb shift of atoms, with the effect's magnitude and sign depending critically on the atomic polarization direction and potentially rivaling the inertial Lamb shift when angular velocity exceeds the transition frequency.
This paper derives cubic interactions and arbitrary-spin propagators for Chiral Higher Spin Gravity in covariant gauges, confirming their agreement with light-cone results and demonstrating that tree-level amplitudes vanish in its self-dual truncation via Berends–Giele recursion.
This paper systematically investigates kink solutions in two-component scalar field theories with quartic potentials using the Bogomolny formalism, demonstrating that generalized superpotentials yield new models featuring continuous families of composite kinks with nontrivial internal structures.
This paper proposes a generally covariant formulation of the operator product expansion in D-dimensional Euclidean conformal field theories by organizing the series in powers of geodesic distance and utilizing tangent vectors for tensor contractions, explicitly demonstrating that universal curvature terms, such as those involving the Schouten tensor, arise in the expansion and are essential for conformal perturbation theory on curved spaces.
This paper investigates the unitarity violation scale of a non-minimally coupled scalar field with quartic self-coupling by calculating six-point scattering amplitudes in both Jordan and Einstein frames, explicitly demonstrating their frame-independence and showing that the dominant contribution arises from the scalar potential.
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.