hep-th

Magic and Non-Clifford Gates in Topological Quantum Field Theory

This paper demonstrates that non-Clifford gates essential for universal quantum computation, such as the Ising interaction, Toffoli, and T gates, arise naturally as path integrals in various topological quantum field theories, with their specific magic-generating properties determined by the underlying algebraic data and topological structures of the theories.

The Spurion Massive EFT (SMEFT)

This paper introduces a spurion analysis of SMEFT low-energy amplitudes based on the Higgs VEV to derive the textures of W- and Z-boson masses, mixing, and fermion couplings, demonstrating that these structures are saturated by dimension-eight contributions.

Generalized Complexity Distances and Non-Invertible Symmetries

This paper generalizes quantum gate complexity and geometric distance measures to non-invertible symmetries in quantum field theories, demonstrating that such symmetries define parallel computation schemes involving post-selection and revealing that their simple objects can be computationally highly complex.

Beyond the Dilute Instanton Gas: Resurgence with Exact Saddles in the Double Well

Probing $\tau$ lepton dipole moments at future Lepton Colliders

This study demonstrates that future lepton colliders, specifically the Future Circular Collider and a multi-TeV muon collider, can significantly improve constraints on $\tau$ lepton dipole moments by several orders of magnitude through various production and decay channels, thereby offering a powerful probe for new physics beyond the Standard Model.

Quantum correction to the diffusion term in stochastic inflation from composite-operator matching in Soft de Sitter Effective Theory

This paper develops a composite-operator renormalization and matching formalism within Soft de Sitter Effective Theory to compute the first next-to-leading order (two-loop) quantum correction to the diffusion term in the stochastic inflation Fokker-Planck equation.

Cornering MeV-GeV Axions and Dark Photons with LDMX

This paper investigates the sensitivity of the Light Dark Matter eXperiment (LDMX) to MeV-GeV axions and dark photons, demonstrating that its near-target tracking capabilities could effectively close the long-standing experimental blind spot in the sub-100 MeV mass range where current prompt-decay and beam-dump searches are ineffective.

Exact Toda Black Holes of Rank-2 Lie Groups

This paper constructs exact spherically-symmetric black hole solutions in $D$ dimensions for Einstein gravity coupled to two Maxwell fields and a dilaton by mapping the equations of motion to one-dimensional Toda equations of all rank-2 Lie groups, deriving new solutions for $B_2$ and $G_2$ cases, and verifying that their thermodynamic properties can be determined without explicitly solving for the metric.

Quantum Charge-4e Superconductivity and Deconfined Pseudocriticality in the Attractive SU(4) Hubbard Model

Using large-scale quantum Monte Carlo simulations, this paper establishes the existence of a zero-temperature charge-4e superconducting phase in the attractive SU(4) Hubbard model and demonstrates that the transition from charge-2e to charge-4e superconductivity is governed by an unconventional deconfined quantum pseudocriticality described by an Sp(4) gauge-Higgs theory.

Carroll fermions, expansions and the lightcone

This paper establishes a comprehensive framework connecting intrinsic Carrollian fermions, small speed-of-light expansions of relativistic Dirac theory, and light-cone dynamics by deriving Carrollian actions from relativistic limits and demonstrating how Carrollian fermions in $D$ dimensions relate to relativistic fermions in both $D$ and $D+1$ dimensions.