hep-th

Global Gauge Symmetries and Spatial Asymptotic Boundary Conditions in Yang-Mills theory

This paper rigorously derives the physical gauge group of Yang-Mills theory as the quotient of boundary-preserving gauge transformations by Gauss law transformations by analyzing the structure of the instantaneous state space, and extends this analysis to demonstrate how boundary conditions and the resulting gauge group differ between the unbroken and broken phases of Yang-Mills-Higgs theory.

Operator Product Expansion in Carrollian CFT

This paper constructs operator product expansions compatible with Carrollian symmetries to unify and extend the framework of Carrollian conformal field theory, thereby demonstrating their control over short-distance expansions while classifying correlators and amplitudes with complex kinematics.

Classical constant electric fields and the Schwinger effect in de Sitter

This paper demonstrates that sustaining a constant electric field in de Sitter space necessitates a tachyonic photon mass, which, when incorporated into an on-shell renormalization scheme, resolves previous infrared divergences by yielding a finite, positive Schwinger current for both charged fermions and scalars.

Dynamics of Loschmidt echoes from operator growth in noisy quantum many-body systems

This paper investigates the dynamics of Loschmidt echoes in noisy quantum many-body systems by establishing an equivalence to dissipative operator norms, proposing a universal two-regime decay model (Gaussian for weak noise and exponential for strong noise) linked to operator growth, and rigorously validating these findings using a solvable chaotic circuit.

Three-Loop Gauge Beta Functions in Supersymmetric Theories with Exponential Higher Covariant Derivative Regularization

This paper explicitly calculates the regulator-dependent parameters for three-loop gauge $\beta$-functions in $\mathcal{N}=1$ supersymmetric theories using exponential higher covariant derivative regularization, providing closed-form expressions and demonstrating how finite coupling redefinitions restore the Novikov–Shifman–Vainshtein–Zakharov relation.

Gravitational constant as a conserved charge in black hole thermodynamics

This paper demonstrates that the gravitational constant can be realized as a conserved charge in four-dimensional Einstein gravity by employing two scalar-gauge pairs within the Abbott-Deser-Tekin formalism, thereby establishing a consistent extended thermodynamic first law and Smarr formula.

Comparing Minimal and Non-Minimal Quintessence Models to 2025 DESI Data

Mind the crosscap: $τ$-scaling in non-orientable gravity and time-reversal-invariant systems

This paper establishes a formalism linking non-orientable gravitational path integrals to time-reversal-invariant quantum chaotic systems by demonstrating that systematic cancellations of late-time divergences in Weil-Petersson volumes on non-orientable surfaces are necessary to recover the Gaussian Orthogonal Ensemble spectral statistics in the high-energy regime.

Limits on the Statistical Description of Charged de Sitter Black Holes

This paper resolves thermodynamic ambiguities in four-dimensional charged de Sitter black holes by adopting a Bousso-Hawking normalization relative to a freely-falling observer, revealing that while the near-extremal Nariai limit avoids a breakdown of the semi-classical description due to finite heat capacity, fundamental statistical limitations persist in the cold and ultracold regimes where the heat capacity vanishes.

Effects of New Forces on Scalar Dark Matter Solitons

This paper numerically investigates how introducing a new, light-mediator force between light bosonic dark matter particles alters the density-radius relationship of gravitationally bound scalar solitons (boson stars), finding that while such a force can modestly improve fits to observed galactic core data, the effect remains limited even at gravitational-strength couplings.