Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

 
 
DownloadE-Mail
  Unstable no-boundary fluctuations from sums over regular metrics

Di Tucci, A., & Lehners, J.-L. (in preparation). Unstable no-boundary fluctuations from sums over regular metrics.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Forschungspapier

Dateien

einblenden: Dateien
ausblenden: Dateien
:
1806.07134.pdf (Preprint), 3MB
Name:
1806.07134.pdf
Beschreibung:
File downloaded from arXiv at 2018-07-31 09:52
OA-Status:
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
-
Copyright Info:
-

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Di Tucci, Alice, Autor
Lehners, J.-L.1, Autor           
Affiliations:
1String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1753351              

Inhalt

einblenden:
ausblenden:
Schlagwörter: General Relativity and Quantum Cosmology, gr-qc,High Energy Physics - Theory, hep-th
 Zusammenfassung: It was recently shown by Feldbrugge et al. that the no-boundary proposal, defined via a Lorentzian path integral and in minisuperspace, leads to unstable fluctuations, in disagreement with early universe observations. In these calculations many off-shell geometries summed over in the path integral in fact contain singularities, and the question arose whether the instability might ultimately be caused by these off-shell singularities. We address this question here by considering a sum over purely regular geometries, by extending a calculation pioneered by Halliwell and Louko. We confirm that the fluctuations are unstable, even in this restricted context which, arguably, is closer in spirit to the original proposal of Hartle and Hawking. Elucidating the reasons for the instability of the no-boundary proposal will hopefully show how to overcome these difficulties, or pave the way to new theories of initial conditions for the universe.

Details

einblenden:
ausblenden:
Sprache(n):
 Datum: 2018-06-19
 Publikationsstatus: Keine Angabe
 Seiten: 22 pages, 8 figures
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: arXiv: 1806.07134
URI: http://arxiv.org/abs/1806.07134
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle

einblenden: