Browsing by Author "de Vaulchier, Balthazar"
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Article
Wavefunction of the universe: Diffeomeorphism invariance and field redefinitions
Partouche, Hervé; Toumbas, Nicolaos K.; de Vaulchier, Balthazar (Proceedings of Science (SISSA), 2022-11-23)We review some recent results concerning the Hartle-Hawking wavefunction of the universe. We focus on pure Einstein theory of gravity in the presence of a positive cosmological constant. We carefully implement the gauge-fixing ...
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Article
Wavefunction of the universe: Reparametrization invariance and field redefinitions of the minisuperspace path integral
Partouche, Hervé; Toumbas, Nicolaos K.; de Vaulchier, Balthazar (Elsevier, 2021-11-03)We consider the Hartle–Hawking wavefunction of the universe defined as a Euclidean path integral that satisfies the “no-boundary proposal.” We focus on the simplest minisuperspace model that comprises a single scale factor ...