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S. Hannestad, Phys.Rev. D63
2001
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J. A. Adams, B. Cresswell, and R. Easther, Phys. Rev. D64
2001
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M. Tegmark and M. Zaldarriaga, Phys.Rev. D66
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S. Bridle, A. Lewis, J. Weller, and G. Efstathiou, Mon.Not.Roy.Astron.Soc. 342
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P. Mukherjee and Y. Wang, Astrophys.J. 599
2003
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H. Peiris et al. (WMAP Collaboration), Astrophys.J.Suppl. 148
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W. Hu and T. Okamoto, Phys. Rev. D69
2004
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S. Hannestad, JCAP 0404
2004
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B. Greene, K. Schalm, J. P. van der Schaar, and G. Shiu, Relativistic astrophysics. Proceedings, 22nd Texas Symposium, Stanford, USA, December 13-17, 2004 , eConf C041213
2004
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E. Silverstein and A. Westphal, Phys.Rev. D78
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2015

Nonlinear Excitations in Inflationary Power Spectra

Miranda, V, Hu, Wayne, He, Chen et al.

Understand

We develop methods to calculate the curvature power spectrum in models where features in the inflaton potential nonlinearly excite modes and generate high frequency features in the spectrum.

The first nontrivial effect of excitations generating further excitations arises at third order in deviations from slow roll.
If these further excitations are contemporaneous, the series can be resummed, showing the exponential sensitivity of the curvature spectrum to potential features.
More generally, this exponential approximation provides a power spectrum template which nonlinearly obeys relations between excitation coefficients and whose parameters may be appropriately adjusted.

Built on

S. Hannestad, Phys.Rev. D63
2001
Earlier work this paper cites.
J. A. Adams, B. Cresswell, and R. Easther, Phys. Rev. D64
2001
Earlier work this paper cites.
M. Tegmark and M. Zaldarriaga, Phys.Rev. D66
2002
Earlier work this paper cites.
S. Bridle, A. Lewis, J. Weller, and G. Efstathiou, Mon.Not.Roy.Astron.Soc. 342
2003
Earlier work this paper cites.
P. Mukherjee and Y. Wang, Astrophys.J. 599
2003
Earlier work this paper cites.
H. Peiris et al. (WMAP Collaboration), Astrophys.J.Suppl. 148
2003
Earlier work this paper cites.
W. Hu and T. Okamoto, Phys. Rev. D69
2004
Earlier work this paper cites.
S. Hannestad, JCAP 0404
2004
Earlier work this paper cites.
B. Greene, K. Schalm, J. P. van der Schaar, and G. Shiu, Relativistic astrophysics. Proceedings, 22nd Texas Symposium, Stanford, USA, December 13-17, 2004 , eConf C041213
2004
Earlier work this paper cites.
S. M. Leach, Mon. Not. Roy. Astron. Soc. 372
2006
Earlier work this paper cites.
E. Silverstein and A. Westphal, Phys.Rev. D78
Original
2008
Earlier work this paper cites.