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Analytic reheating
Joseph Elliston!University of Sussex
In collaboration with Stefano Orani and David Mulryne
arXiv: 1402.4800
Reheating matters…
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Our result encapsulates:
Two-field slow-roll inflation Curvaton-type
Inhomogeneous End of Inflation! Modulated Reheating!
Two-field slow-roll inflation Curvaton-type
Inhomogeneous End of Inflation! Modulated Reheating!
Inhomogeneous End of Inflation!
�
�
Isocurvature fieldAdiabatic!field
Video Available on Youtube
Modulated Reheating !
�
⇢
MatterRadiation
H = �(�)
Decay width
Equivalence between Inhomogeneous End of Inflation and Modulated Reheating: see arXiv: 1307.7095
Video Available on Youtube
Analytic calculations…
Phase A is just repeating Vernizzi and Wands (2006)…
Analytic calculations…
Allows arbitrary hypersurfaces
(uniform density limit)
Principle result
Modulation effects !=1 if standard curvaton
Horizon Crossing Approximation piece!
(constant)
“Oscillation parameter”!degenerate with r
Conclusions
• Reheating can alter the predictions of inflation!
• We have a general but simple formula for perturbative reheating with two-components!
• Combines the Curvaton, Inhomogeneous End of Inflation and Modulated Reheating models.!
• Our work is a test bed for investigating the analytic criterion for phase transitions.
arXiv: 1402.4800
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