Parameterized Families of Toric Code Phase: $em$-duality family and higher-order anyon pumping
Abstract
Within the toric-code phase, we study parameterized families of topologically ordered states. We construct - and -parameter families of local Hamiltonians and confirm their non-triviality via topological pumping. For the -parameter family, we show that the -exchange defect is pumped into the bond Hilbert space of a tensor-network representation. For the -parameter case, we construct a ``pump of a pump'' that transports an -family of a system in one lower spatial dimension. Using similar methods, we also present a -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.
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