English

Parameterized Families of Toric Code Phase: $em$-duality family and higher-order anyon pumping

Strongly Correlated Electrons 2026-05-06 v1 High Energy Physics - Theory Mathematical Physics math.MP Quantum Physics

Abstract

Within the toric-code phase, we study parameterized families of topologically ordered states. We construct 11- and 22-parameter families of local Hamiltonians and confirm their non-triviality via topological pumping. For the 11-parameter family, we show that the emem-exchange defect is pumped into the bond Hilbert space of a tensor-network representation. For the 22-parameter case, we construct a ``pump of a pump'' that transports an S1S^1-family of a system in one lower spatial dimension. Using similar methods, we also present a 11-parameter family with a higher-order anyon pump that produces corner-localized anyon modes. These constructions provide explicit lattice realizations and concrete diagnostics of family-level topology. We use recently developed boundary algebra methods to study the non-triviality of these families.

Keywords

Cite

@article{arxiv.2605.03891,
  title  = {Parameterized Families of Toric Code Phase: $em$-duality family and higher-order anyon pumping},
  author = {Shuhei Ohyama and Takamasa Ando and Ryan Thorngren},
  journal= {arXiv preprint arXiv:2605.03891},
  year   = {2026}
}

Comments

48 pages, 15 figures