Correlation-consistency cartography of the double-inflation landscape

Tsujikawa, Shinji, Parkinson, David and Bassett, Bruce A. (2003) Correlation-consistency cartography of the double-inflation landscape. Physical Review D, 67 8: 083516.1-083516.20. doi:10.1103/PhysRevD.67.083516

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Author Tsujikawa, Shinji
Parkinson, David
Bassett, Bruce A.
Title Correlation-consistency cartography of the double-inflation landscape
Journal name Physical Review D   Check publisher's open access policy
ISSN 0556-2821
Publication date 2003-04
Sub-type Article (original research)
DOI 10.1103/PhysRevD.67.083516
Open Access Status File (Publisher version)
Volume 67
Issue 8
Start page 083516.1
End page 083516.20
Total pages 20
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We show explicitly some exciting features of double inflation: (i) it can often lead to strongly correlated adiabatic and entropy (isocurvature) power spectra; (ii) the two-field slow-roll consistency relations can be violated when the correlation is large at the Hubble crossing; (iii) the spectra of adiabatic and entropy perturbations can be strongly scale dependent and tilted toward either the red or blue. These effects are typically due to a light or time-dependent entropy mass and a non-negligible angular velocity in field space during inflation. They are illustrated via a multiparameter numerical search for correlations in two concrete models. The correlation is found to be particularly strong in a supersymmetric scenario due to the rapid growth of entropy perturbations in the tachyonic region separating the two inflationary stages. Our analysis suggests that realistic double-inflation models will provide a rich and fruitful arena for the application of future cosmic data sets and new approximation schemes which go beyond slow roll.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # 083516

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Created: Mon, 28 Feb 2011, 09:47:28 EST