Ultraviolet regularity from quantum gravitational indefinite causal structure

• URL: http://arxiv.org/abs/2003.00562v1
• Date: Sun, 1 Mar 2020 19:17:24 GMT
• Title: Ultraviolet regularity from quantum gravitational indefinite causal structure
• Authors: Ding Jia
• Abstract summary: Indefinite causal structure is generically present in theories of quantum gravity admitting a path formulation. We show that summing over causal structures eliminates ultraviolet divergences of matter QFT and resolves spacetime singularities.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Indefinite causal structure is generically present in theories of quantum gravity admitting a path integral formulation. We show that summing over causal structures eliminates ultraviolet divergences of matter QFT and resolves spacetime singularities using the non-perturbative World Quantum Gravity approach. Independent information-theoretic and model-independent considerations suggest that the mechanism of ultraviolet regularization by indefinite causal structure also applies to other theories of quantum gravity.

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