PhysRevD.81.103502.pdf (605.92 kB)
Dark energy view of inflation
journal contribution
posted on 2023-06-08, 10:02 authored by Stéphane Ilic, Martin Kunz, Andrew R Liddle, Joshua A FriemanTraditionally, inflationary models are analyzed in terms of parameters such as the scalar spectral index n(s) and the tensor to scalar ratio r, while dark energy models are studied in terms of the equation of state parameter w. Motivated by the fact that both deal with periods of accelerated expansion, we study the evolution of w during inflation, in order to derive observational constraints on its value during an earlier epoch likely dominated by a dynamic form of dark energy. We find that the cosmic microwave background and large-scale structure data is consistent with w(inflation) = -1 and provides an upper limit of 1 + w less than or similar to 0.02. Nonetheless, an exact de Sitter expansion with a constant w = -1 is disfavored since this would result in n(s) = 1.
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Publication status
- Published
File Version
- Published version
Journal
Physical Review DISSN
1550-7998Publisher
American Physical SocietyExternal DOI
Issue
10Volume
81Department affiliated with
- Physics and Astronomy Publications
Notes
Article Number: 103502Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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