Topological invariant of 4-manifolds based on a 3-group

Abstract

We study a generalization of a 4-dimensional BF-theory in the context of higher gauge theory. We construct a triangulation independent topological state sum Z, based on the classical 3BF action for a general 3-group and a 4-dimensional spacetime manifold. This state sum coincides with Porter's TQFT for d=4 and n=3. In order to verify that the constructed state sum is a topological invariant of the underlying 4-dimensional manifold, its behavior under Pachner moves is analyzed, and it is obtained that the state sum Z remains the same. This paper is a generalization of the work done by Girelli, Pfeiffer, and Popescu for the case of state sum based on the classical 2BF action with the underlying 2-group structure.

arXiv comment21+12 pages. arXiv admin note: text overlap with arXiv:0708.3051 by other authors

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Cited by in corpus (2)

• Gauge symmetry of the 3BF theory for a generic Lie 3-group
• Henneaux-Teitelboim gauge symmetry and its applications to higher gauge theories