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On Examples of Intermediate Subfactors from Conformal Field Theory

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Abstract

Motivated by our subfactor generalization of Wall’s conjecture, in this paper we determine all intermediate subfactors for conformal subnets corresponding to four infinite series of conformal inclusions, and as a consequence we verify that these series of subfactors verify our conjecture. Our results can be stated in the framework of Vertex Operator Algebras. We also verify our conjecture for Jones-Wassermann subfactors from representations of Loop groups extending our earlier results.

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References

  1. Altschüler D., Bauer M., Itzykson C.: The branching rules of conformal embeddings. Commun. Math. Phys. 132, 349–364 (1990)

    Article  ADS  Google Scholar 

  2. Böckenhauer J., Evans D.E.: Modular invariants, graphs and α-induction for nets of subfactors. I. Commun. Math. Phys. 197, 361–386 (1998)

    Article  ADS  MATH  Google Scholar 

  3. Böckenhauer J., Evans D.E., Kawahigashi Y.: Chiral structure of modular invariants for subfactors. Commun. Math. Phys. 210, 733–784 (2000)

    Article  ADS  MATH  Google Scholar 

  4. Bisch D., Jones V.F.R.: Algebras associated to intermediate subfactors. Invent. Math. 128(1), 89–157 (1997)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  5. Dong, C.: Introduction to vertex operator algebras I. Sūrikaisekikenkyūsho Kōkyūroku, No. 904 (1995), pp. 1–25. Also see http://arxiv.org/abs/q-alg/9504017v1, 1995

  6. Dong, C., Lepowsky, J.: Generalized vertex algebras and relative vertex operators. Progress in Mathematics, 112, Basel-Bosten: Birkhäuser, 1993

  7. Fröhlich J., Gabbiani F.: Operator algebras and Conformal field theory. Commun. Math. Phys. 155, 569–640 (1993)

    Article  ADS  MATH  Google Scholar 

  8. Frenkel, I.B., Lepowsky, J., Ries, J.: Vertex operator algebras and the Monster. New York: Academic, 1988

  9. Frenkel I., Zhu Y.: Vertex operator algebras associated to representations of affine and Virasoro algebras. Duke Math. J. 66(1), 123–168 (1992)

    Article  MathSciNet  MATH  Google Scholar 

  10. Gannon T., Ruelle P., Walton M.A.: Automorphism modular invariants of current algebras. Commun. Math. Phys. 179(1), 121–156 (1996)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  11. Goodman F., Wenzl H.: Littlewood-Richardson coefficients for Hecke algebras at roots of unity. Adv. Math. 82(2), 244–265 (1990)

    Article  MathSciNet  MATH  Google Scholar 

  12. Grossman P., Jones V.F.R.: Intermediate subfactors with no extra structure. J. Amer. Math. Soc. 20(1), 219–265 (2007)

    Article  MathSciNet  MATH  Google Scholar 

  13. Guido D., Longo R.: The conformal spin and statistics theorem. Commun. Math. Phys. 181, 11–35 (1996)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  14. Guralnick R., Xu F.: On a subfactor generalization of Wall’s conjecture. J. Algebra 332, 457–468 (2011)

    Article  MathSciNet  MATH  Google Scholar 

  15. Jones, V.F.R.: Fusion en algFbres de von Neumann et groupes de lacets (d’aprFs A. Wassermann). (French) [Fusion in von Neumann algebras and loop groups (after A. Wassermann)] Seminaire Bourbaki, Vol. 1994/95. Asterisque No. 237 (1996), Exp. No. 800, 5, 251–273

  16. Kac V.G.: Vertex algebras for beginners. Providence, RI: Amer. Math. Soc., 1997

  17. Kac, V.G.: “Infinite Dimensional Lie Algebras”, 3rd Edition, Cambridge: Cambridge University Press, 1990

  18. Kac V.G., Longo R., Xu F.: Solitons in affine and permutation orbifolds. Commun. Math. Phys. 253(3), 723–764 (2005)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  19. Tsuchiya A., Kanie Y.: Vertex Operators in conformal field theory on P 1 and monodromy representations of braid group. Adv. Studies in Pure Math. 16(88), 297–372 (1988)

    MathSciNet  Google Scholar 

  20. Kac V.G., Wakimoto M.: Modular and conformal invariance constraints in representation theory of affine algebras. Adv. in Math. 70, 156–234 (1988)

    Article  MathSciNet  MATH  Google Scholar 

  21. Levstein F., Liberati J.I.: Branching rules for conformal embeddings. Commun. Math. Phys. 173, 1–16 (1995)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  22. Longo R.: Conformal subnets and intermediate subfactors. Commun. Math. Phys. 237(1–2), 7–30 (2003)

    MathSciNet  ADS  MATH  Google Scholar 

  23. Longo R., Rehren K.-H.: Nets of subfactors. Rev. Math. Phys. 7, 567–597 (1995)

    Article  MathSciNet  MATH  Google Scholar 

  24. Goddard P., Nahm W., Olive D.: Symmetric spaces, Sugawara’s energy momentum tensor in two dimensions and free fermions. Phys. Lett. B 160(1–3), 111–116 (1985)

    MathSciNet  ADS  MATH  Google Scholar 

  25. Izumi M., Longo R., Popa S.: A Galois correspondence for compact groups of automorphisms of von Neumann Algebras with a generalization to Kac algebras. J. Funct. Anal. 155, 25–63 (1998)

    Article  MathSciNet  MATH  Google Scholar 

  26. Jones V.F.R.: Index for subfactors. Invent. Math. 72, 1–25 (1983)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  27. Jones V.F.R., Xu F.: Intersections of finite families of finite index subfactors. Internat. J. Math. 15(7), 717–733 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  28. Liebeck M.W., Pyber L., Shalev A.: On a conjecture of G. E. Wall. J. Algebra 317(1), 184–197 (2007)

    Article  MathSciNet  MATH  Google Scholar 

  29. Pimsner M., Popa S.: Entropy and index for subfactors. Ann. Scient. Ec. Norm. Sup. 19, 57–106 (1986)

    MathSciNet  MATH  Google Scholar 

  30. Pressley, A., Segal, G.: “Loop Groups”. Oxford: Oxford University Press, 1986

  31. Wall, G.E.: Some applications of the Eulerian functions of a finite group. J. Austral. Math. Soc. 2, 35–59 (1961/1962)

    Google Scholar 

  32. Wassermann A.: Operator algebras and Conformal field theories III. Invent. Math. 133, 467–538 (1998)

    Article  MathSciNet  ADS  MATH  Google Scholar 

  33. Xu F.: New braided endomorphisms from conformal inclusions. Commun. Math. Phys. 192, 347–403 (1998)

    Article  ADS  Google Scholar 

  34. Xu F.: Algebraic coset conformal field theories. Commun. Math. Phys. 211(1), 1–43 (2000)

    Article  ADS  MATH  Google Scholar 

  35. Xu F.: Mirror extensions of local nets. Commun. Math. Phys. 270(3), 835–847 (2007)

    Article  ADS  MATH  Google Scholar 

  36. Xu F.: An application of mirror extensions. Commun. Math. Phys. 290(1), 83–103 (2009)

    Article  ADS  MATH  Google Scholar 

  37. Xu F.: On intermediate subfactors of Goodman-de la Harpe-Jones subfactors. Commun. Math. Phys. 298(3), 707–739 (2010)

    Article  ADS  MATH  Google Scholar 

  38. Xu F.: Some computations in the cyclic permutations of completely rational nets. Commun. Math. Phys. 267(3), 757–782 (2006)

    Article  ADS  MATH  Google Scholar 

  39. Xu, F.: On representing some lattices as lattices of intermediate subfactors of finite index. Adv. Math. 220(5), 1317–1356; corrections in the proof of Cor. 5.23 in http://arxiv.org/abs/math/0703248v2 [math.OA], 2009

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Correspondence to Feng Xu.

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Communicated by Y. Kawahigashi

Supported in part by NSF grant and an academic senate grant from UCR.

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Xu, F. On Examples of Intermediate Subfactors from Conformal Field Theory. Commun. Math. Phys. 320, 761–781 (2013). https://doi.org/10.1007/s00220-012-1635-4

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