Generalizations of Kitaev’s honeycomb model from braided fusion categories
Fusion surface models, as introduced by Inamura and Ohmori, extend the concept of anyon chains to 2+1 dimensions, taking fusion 2-categories as their input. In this work, we construct and analyze fusion surface models on the honeycomb lattice built from braided fusion 1-categories. These models pres...
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2025-06-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.18.6.170 |
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| author | Luisa Eck, Paul Fendley |
| author_facet | Luisa Eck, Paul Fendley |
| author_sort | Luisa Eck, Paul Fendley |
| collection | DOAJ |
| description | Fusion surface models, as introduced by Inamura and Ohmori, extend the concept of anyon chains to 2+1 dimensions, taking fusion 2-categories as their input. In this work, we construct and analyze fusion surface models on the honeycomb lattice built from braided fusion 1-categories. These models preserve mutually commuting plaquette operators and anomalous 1-form symmetries. Their Hamiltonian is chosen to mimic the structure of Kitaev's honeycomb model, which is unitarily equivalent to the Ising fusion surface model. In the anisotropic limit, where one coupling constant is dominant, the fusion surface models reduce to Levin-Wen string-nets. In the isotropic limit, they are described by weakly coupled anyon chains and are likely to realize chiral topological order. We focus on three specific examples: (i) Kitaev's honeycomb model with a perturbation breaking time-reversal symmetry that realizes chiral Ising topological order, (ii) a $\mathbb{Z}_N$ generalization proposed by Barkeshli et al., which potentially realizes chiral parafermion topological order, and (iii) a novel Fibonacci honeycomb model featuring a non-invertible 1-form symmetry. |
| format | Article |
| id | doaj-art-4e384d315d4e4e1c9671ebbd1268c586 |
| institution | Kabale University |
| issn | 2542-4653 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj-art-4e384d315d4e4e1c9671ebbd1268c5862025-08-20T03:36:42ZengSciPostSciPost Physics2542-46532025-06-0118617010.21468/SciPostPhys.18.6.170Generalizations of Kitaev’s honeycomb model from braided fusion categoriesLuisa Eck, Paul FendleyFusion surface models, as introduced by Inamura and Ohmori, extend the concept of anyon chains to 2+1 dimensions, taking fusion 2-categories as their input. In this work, we construct and analyze fusion surface models on the honeycomb lattice built from braided fusion 1-categories. These models preserve mutually commuting plaquette operators and anomalous 1-form symmetries. Their Hamiltonian is chosen to mimic the structure of Kitaev's honeycomb model, which is unitarily equivalent to the Ising fusion surface model. In the anisotropic limit, where one coupling constant is dominant, the fusion surface models reduce to Levin-Wen string-nets. In the isotropic limit, they are described by weakly coupled anyon chains and are likely to realize chiral topological order. We focus on three specific examples: (i) Kitaev's honeycomb model with a perturbation breaking time-reversal symmetry that realizes chiral Ising topological order, (ii) a $\mathbb{Z}_N$ generalization proposed by Barkeshli et al., which potentially realizes chiral parafermion topological order, and (iii) a novel Fibonacci honeycomb model featuring a non-invertible 1-form symmetry.https://scipost.org/SciPostPhys.18.6.170 |
| spellingShingle | Luisa Eck, Paul Fendley Generalizations of Kitaev’s honeycomb model from braided fusion categories SciPost Physics |
| title | Generalizations of Kitaev’s honeycomb model from braided fusion categories |
| title_full | Generalizations of Kitaev’s honeycomb model from braided fusion categories |
| title_fullStr | Generalizations of Kitaev’s honeycomb model from braided fusion categories |
| title_full_unstemmed | Generalizations of Kitaev’s honeycomb model from braided fusion categories |
| title_short | Generalizations of Kitaev’s honeycomb model from braided fusion categories |
| title_sort | generalizations of kitaev s honeycomb model from braided fusion categories |
| url | https://scipost.org/SciPostPhys.18.6.170 |
| work_keys_str_mv | AT luisaeckpaulfendley generalizationsofkitaevshoneycombmodelfrombraidedfusioncategories |