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A Lorentzian cure for Euclidean troubles

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arxiv hep-th/0201104 v1 pith:ZJIBGO4S submitted 2002-01-15 hep-th

J. Ambjorn (NBI , Copenhagen) , A. Dasgupta (AEI , Golm) , J. Jurkiewicz (U. Krakow) , R. Loll (U. Utrecht) This is my paper · ORCID
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keywords lorentzianactionapproachcomescomingconformalconstructioncontinuum
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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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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Constraints are not enough

    hep-th 2025-05 accept novelty 8.0 of 10

    Smooth Euclidean geometries that satisfy the Hamiltonian and momentum constraints on every slice of a foliation can still have arbitrarily negative Einstein-Hilbert action, for compact, asymptotically flat, and asympt...

  2. Superconformal indices and black hole saddles

    hep-th 2026-08 conditional novelty 7.0 of 10

    At large Im tau the superconformal index tends to 1, and the authors show that a Picard-Lefschetz analysis of a Lorentzian-inspired bulk integral enforces this by making all exponentially large black hole saddles irre...

  3. How to tame your (black hole) saddles: Lessons from the Lorentzian Gravitational Path Integral

    hep-th 2026-03 accept novelty 6.0 of 10

    A Lorentzian path integral contour for charged AdS black holes selects a finite subset of complex saddles via Picard-Lefschetz theory, ensuring the semiclassical sum converges at finite β.

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