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Paper detail

Ultraviolet regularity from quantum gravitational indefinite causal structure

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.

preprint2020arXivOpen access
Ding Jia
gr-qchep-thquant-ph
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