3 papers
quant-ph2026
Constraints on phantom codes from automorphism group bounds
Arthur S. Morris, Daniel Malz
Executing a logical quantum circuit fault-tolerantly incurs a large spacetime overhead. Recent work has proposed and investigated phantom codes, defined by the property that every…
cond-mat.str-el2025
Euler topology in classical spin liquids
Luca Rüegg, Arthur Morris, Han Yan +1
Classical spin liquids have recently been analyzed in view of the single-gap homotopy classification of their dispersive eigenvectors. We show that the recent progress in defining…
cond-mat.mes-hall2024
Non-Abelian Hopf-Euler insulators
Wojciech J. Jankowski, Arthur S. Morris, Zory Davoyan +3
We discuss a class of three-band non-Abelian topological insulators in three dimensions that carry a single bulk Hopf index protected by spatiotemporal () inversion s…