Author

Masataka Watanabe

2 papers indexed here

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Preprint Oct 2026

Intertwining Defects and Fermion-Boundary Scattering from TQFT

We construct conformal boundary conditions of free Dirac fermions that preserve chiral, anomaly-free symmetries, and determine the associated fermion-boundary scattering, using the TQFT/CFT framework. We apply the construction to several previously unresolved examples: higher-charge monopoles in non-chiral QED, a famil...

Kantaro Ohmori, Masataka Watanabe, Peng-Cheng Wei et al. · 1 citation

Preprint Aug 2026

Spectral Topology and Universal Krylov Dynamics

The leading asymptotic growth of Lanczos coefficients is controlled by spectral tails and furnishes a coarse classification of Krylov dynamics. We show that the \textit{global topology} of the spectral measure, specifically the number of connected components, the gap structure, and the behaviour at gap-closing transiti...

Jeff Murugan, H. J. V. van Zyl, Masataka Watanabe · 1 citation