Universität zu Köln

Kiefer, Claus ORCID: 0000-0001-6163-9519 and Vardanyan, Tatevik (2022). Power spectrum for perturbations in an inflationary model for a closed universe. Gen. Relativ. Gravit., 54 (4). NEW YORK: SPRINGER/PLENUM PUBLISHERS. ISSN 1572-9532

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Abstract

We derive the power spectrum of primordial quantum fluctuations in an inflationary universe for curvature parameter kappa = 1. This is achieved through a Born-Oppenheimer type of approximation scheme from the Wheeler-DeWitt equation of canonical quantum gravity using gauge-invariant variables. Compared to the flat model, the closed model exhibits a deficit of power at large scales.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kiefer, Claus UNSPECIFIED orcid.org/0000-0001-6163-9519 UNSPECIFIED Vardanyan, Tatevik UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-657440
DOI:	10.1007/s10714-022-02918-3
Journal or Publication Title:	Gen. Relativ. Gravit.
Volume:	54
Number:	4
Date:	2022
Publisher:	SPRINGER/PLENUM PUBLISHERS
Place of Publication:	NEW YORK
ISSN:	1572-9532
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TENSOR; SCALAR Multiple languages Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/65744