3-dimensional Gravity from the Turaev-Viro Invariant

Details 3-dimensional Gravity from the Turaev-Viro Invariant 3-dimensional Gravity from the Turaev-Viro Invariant

1991-10-21

arxiv.org/abs/hep-th/9110057v1

Phys.Rev.Lett.68:1795-1798,1992

Physics

High Energy Physics

High Energy Physics - Theory

11pages

Scientific paper

10.1103/PhysRevLett.68.1795

We study the $q$-deformed su(2) spin network as a 3-dimensional quantum gravity model. We show that in the semiclassical continuum limit the Turaev-Viro invariant obtained recently defines naturally regularized path-integral $\grave{\rm a}$ la Ponzano-Regge, In which a contribution from the cosmological term is effectively included. The regularization dependent cosmological constant is found to be ${4\pi^2\over k^2} +O(k^{-4})$, where $q^{2k}=1$. We also discuss the relation to the Euclidean Chern-Simons-Witten gravity in 3-dimension.

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