4-dimensional BF Gravity on the Lattice

Details 4-dimensional BF Gravity on the Lattice 4-dimensional BF Gravity on the Lattice

1999-11-29

arxiv.org/abs/hep-th/9911228v1

Nucl.Phys. B574 (2000) 809-848

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX2e, 45 pages, 55 eps figures

Scientific paper

10.1016/S0550-3213(00)00017-1

We propose the lattice version of $BF$ gravity action whose partition function leads to the product of a particular form of 15-$j$ symbol which corresponds to a 4-simplex. The action is explicitly constructed by lattice $B$ field defined on triangles and link variables defined on dual links and is shown to be invariant under lattice local Lorentz transformation and Kalb-Ramond gauge transformation. We explicitly show that the partition function is Pachner move invariant and thus topological. The action includes the vanishing holonomy constraint which can be interpreted as a gauge fixing condition. This formulation of lattice $BF$ theory can be generalized into arbitrary dimensions.

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