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• W4286567138 startingPage "137340" @default.
• W4286567138 abstract "In quantum cosmology the DeWitt boundary condition is a proposal to set the wave function of the universe to vanish at the classical big-bang singularity. In this Letter, we show that in many gravitational theories including general relativity, the DeWitt wave function does not take a desired form once tensor perturbations around a homogeneous and isotropic closed universe are taken into account: anisotropies and inhomogeneities due to the perturbations are not suppressed near the classical singularity. We then show that Hořava-Lifshitz gravity provides a satisfactory DeWitt wave function. In particular, in the limit of z=3 anisotropic scaling, we find an exact analytic expression for the DeWitt wave function of the universe with scale-invariant perturbations. In general cases with relevant deformations, we show that the DeWitt wave function can be systematically expanded around the classical big-bang singularity with perturbations under control." @default.
• W4286567138 created "2022-07-22" @default.
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• W4286567138 date "2022-10-01" @default.
• W4286567138 modified "2023-10-18" @default.
• W4286567138 title "DeWitt boundary condition is consistent in Hořava-Lifshitz quantum gravity" @default.
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• W4286567138 doi "https://doi.org/10.1016/j.physletb.2022.137340" @default.
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