Jokela, Niko; Kajantie, K.; Sarkkinen, Miika; Laine, M.; Nurmi, Sami (2023). Inflationary gravitational wave background as a tail effect. Physical review. D - particles, fields, gravitation, and cosmology, 108(10) American Physical Society 10.1103/PhysRevD.108.L101503
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The free propagator of a massless mode in an expanding universe can be written as a sum of two terms, a light cone and a tail part. The latter describes a subluminal (timelike) signal. We show that the inflationary gravitational wave background, influencing cosmic microwave background polarization and routinely used for constraining inflationary models through the so-called r ratio, originates exclusively from the tail part.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Laine, Mikko Sakari |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Franziska Stämpfli |
Date Deposited: |
04 Dec 2023 09:25 |
Last Modified: |
04 Dec 2023 09:25 |
Publisher DOI: |
10.1103/PhysRevD.108.L101503 |
BORIS DOI: |
10.48350/189687 |
URI: |
https://boris.unibe.ch/id/eprint/189687 |
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