SciPost Submission Page
Dualities between 2+1d fusion surface models from braided fusion categories
by Luisa Eck
Submission summary
| Authors (as registered SciPost users): | Luisa Eck |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202510_00018v1 (pdf) |
| Date accepted: | Oct. 29, 2025 |
| Date submitted: | Oct. 10, 2025, 7:57 p.m. |
| Submitted by: | Luisa Eck |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
Fusion surface models generalize the concept of anyon chains to 2+1 dimensions, utilizing fusion 2-categories as their input. We investigate bond-algebraic dualities in these systems and show that distinct module tensor categories $\mathcal{M}$ over the same braided fusion category $\mathcal{B}$ give rise to dual lattice models. This extends the 1+1d result that dualities in anyon chains are classified by module categories over fusion categories. We analyze two concrete examples: (i) a $\text{Rep}(S_3)$ model with a constrained Hilbert space, dual to the spin-$\tfrac{1}{2}$ XXZ model on the honeycomb lattice, and (ii) a bilayer Kitaev honeycomb model, dual to a spin-$\tfrac{1}{2}$ model with XXZ and Ising interactions. Unlike regular $\mathcal{M}=\mathcal{B}$ fusion surface models, which conserve only 1-form symmetries, models constructed from $\mathcal{M} \neq \mathcal{B}$ can exhibit both 1-form and 0-form symmetries, including non-invertible ones.
Author indications on fulfilling journal expectations
- Provide a novel and synergetic link between different research areas.
- Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
- Detail a groundbreaking theoretical/experimental/computational discovery
- Present a breakthrough on a previously-identified and long-standing research stumbling block
List of changes
- Expanded Section 6 with additional worked examples of fusion surface models with 0-form and 1-form symmetries.
- Clarified the action of condensation defects in Section 6.
- Added an explanation to Section 4.2 for why chiral topological order is not expected in this model.
- Extended and clarified the discussion of quantum circuit implementations and symmetry-enriched topological orders in the Conclusions.
Current status:
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