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A Lorentzian cure for Euclidean troubles

J. Ambjorn, A. Dasgupta, J. Jurkiewicz, R. Loll

hep-tharXiv:hep-th/0201104

Abstract

There is strong evidence coming from Lorentzian dynamical triangulations that the unboundedness of the gravitational action is no obstacle to the construction of a well-defined non-perturbative path integral. In a continuum approach, a similar suppression of the conformal divergence comes about as the result of a non-trivial path-integral measure.

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