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• W4289889425 abstract "A bstract We study complex saddles of the Lorentzian path integral for 4D axion gravity and its dual description in terms of a 3-form flux, which include the Giddings-Strominger Euclidean wormhole. Transition amplitudes are computed using the Lorentzian path integral and with the help of Picard-Lefschetz theory. The number and nature of saddles is shown to qualitatively change in the presence of a bilocal operator that could arise, for example, as a result of considering higher-topology transitions. We also analyze the stability of the Giddings-Strominger wormhole in the 3-form picture, where we find that it represents a perturbatively stable Euclidean saddle of the gravitational path integral. This calls into question the ultimate fate of such solutions in an ultraviolet-complete theory of quantum gravity." @default.
• W4289889425 created "2022-08-05" @default.
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• W4289889425 date "2022-08-04" @default.
• W4289889425 modified "2023-10-18" @default.
• W4289889425 title "Complex saddles and Euclidean wormholes in the Lorentzian path integral" @default.
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• W4289889425 doi "https://doi.org/10.1007/jhep08(2022)064" @default.
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