Fluxes, bundle gerbes and 2-Hilbert spaces

Severin Bunk*, Richard Joseph Szabo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
33 Downloads (Pure)


We elaborate on the construction of a prequantum 2-Hilbert space from a bundle gerbe over a 2-plectic manifold, providing the first steps in a programme of higher geometric quantisation of closed strings in flux compactifications and of M5-branes in C-fields. We review in detail the construction of the 2-category of bundle gerbes and introduce the higher geometrical structures necessary to turn their categories of sections into 2-Hilbert spaces. We work out several explicit examples of 2-Hilbert spaces in the context of closed strings and M5-branes on flat space. We also work out the prequantum 2-Hilbert space associated with an M-theory lift of closed strings described by an asymmetric cyclic orbifold of the (Formula presented.) WZW model, providing an example of sections of a torsion gerbe on a curved background. We describe the dimensional reduction of M-theory to string theory in these settings as a map from 2-isomorphism classes of sections of bundle gerbes to sections of corresponding line bundles, which is compatible with the respective monoidal structures and module actions.

Original languageEnglish
Pages (from-to)1-42
Number of pages42
JournalLetters in Mathematical Physics
Early online date23 May 2017
Publication statusE-pub ahead of print - 23 May 2017


  • Bundle gerbes
  • Fluxes in string and M-theory
  • Higher geometric quantisation
  • Higher geometric structures

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics


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