Nondegenerate extensions of neargroup braided fusion categories
Abstract
This is a study of weakly integral braided fusion categories with elementary fusion rules to determine which possess nondegenerately braided extensions of theoretically minimal dimension, or equivalently in this case, which satisfy the minimal modular extension conjecture. We classify neargroup braided fusion categories satisfying the minimal modular extension conjecture; the remaining TambaraYamagami braided fusion categories provide arbitrarily large families of braided fusion categories with identical fusion rules violating the minimal modular extension conjecture. These examples generalize to braided fusion categories with the fusion rules of the representation categories of extraspecial $p$groups for any prime $p$, which possess a minimal modular extension only if they arise as the adjoint subcategory of a twisted double of an extraspecial $p$group.
 Publication:

arXiv eprints
 Pub Date:
 September 2021
 arXiv:
 arXiv:2109.04011
 Bibcode:
 2021arXiv210904011S
 Keywords:

 Mathematics  Quantum Algebra
 EPrint:
 20 pages