Cyclotomic Integers, Fusion Categories, and Subfactors

By Frank Calegari, S. Morrison, Noah Snyder. 2010

58 citations recorded by the source corpus.

Dimensions of objects in fusion categories are cyclotomic integers, hence number theoretic results have implications in the study of fusion categories and finite depth subfactors. We give two such applications. The first application is determining a complete list of numbers in the interval (2, 76/33) which can occur as the Frobenius-Perron dimension of an object in a fusion category. The smallest number on this list is realized in a new fusion category which is constructed in the Appendix written by V. Ostrik, while the others are all realized by known examples. The second application proves that in any family of graphs obtained by adding a 2-valent tree to a fixed graph, either only finitely many graphs are principal graphs of subfactors or the family consists of the An or Dn Dynkin diagrams. This result is effective, and we apply it to several families arising in the classification of subfactors of index less than 5.

Subfields: Discrete Mathematics and Combinatorics, Geometry and Topology, Mathematical Physics

View Paper: https://www.semanticscholar.org/paper/efcbf1926041f77048f939824e8a9ef350df755d

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In Discrete Mathematics and Combinatorics

  1. Vaughan F. R. Jones
  2. Noah Snyder
  3. S. Morrison
  4. Zhengwei Liu
  5. C. Blanchet
  6. David E. V. Rose
  7. Paul Wedrich

In Geometry and Topology

  1. Noah Snyder
  2. S. Morrison
  3. Vaughan F. R. Jones
  4. Zhengwei Liu
  5. E. Peters
  6. David Penneys
  7. David E. V. Rose
  8. Bob Coecke

In Mathematical Physics

  1. Noah Snyder
  2. S. Morrison
  3. Vaughan F. R. Jones
  4. Zhengwei Liu
  5. E. Peters
  6. David Penneys
  7. David E. V. Rose
  8. Bob Coecke

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