A local Wheeler-DeWitt measure for the string landscape
According to the `Cosmological Central Dogma', de Sitter space can be viewed as a quantum mechanical system with a finite number of degrees of freedom, set by the horizon area. We use this assumption together with the Wheeler-DeWitt (WDW) equation to approach the measure problem of eternal infl...
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| Autori principali: | , , , , |
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| Natura: | Article (Journal) Chapter/Article |
| Lingua: | inglese |
| Pubblicazione: |
19 May 2022
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| In: |
Arxiv
Year: 2022, Pages: 1-41 |
| Accesso online: | Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/2205.09772
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| Note sull'autore: | Bjoern Friedrich, Arthur Hebecker, Manfred Salmhofer, Jonah Cedric Strauss, Johannes Walcher |
| Riassunto: | According to the `Cosmological Central Dogma', de Sitter space can be viewed as a quantum mechanical system with a finite number of degrees of freedom, set by the horizon area. We use this assumption together with the Wheeler-DeWitt (WDW) equation to approach the measure problem of eternal inflation. Thus, our goal is to find a time-independent wave function of the universe on a total Hilbert space defined as the direct sum of a variety of subspaces: A finite-dimensional subspace for each de Sitter vacuum and an infinite-dimensional subspace for each terminal Minkowski or AdS vaccuum. We argue that, to be consistent with semiclassical intuition, such a solution requires the presence of sources. These are implemented as an inhomogenous term in the WDW equation, induced by the Hartle-Hawking no-boundary or the Linde/Vilenkin tunneling proposal. Taken together, these steps unambiguously lead to what we would like to think of as a `Local WDW measure,' where `local' refers to the fact that the dS part of the resulting wave function describes a superposition of static patches. The global 3-sphere spatial section of the entire multiverse makes no appearance. |
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| Descrizione del documento: | Gesehen am 01.06.2022 |
| Descrizione fisica: | Online Resource |