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2008

Effects of particle production during inflation

Romano, Antonio Enea, Sasaki, Misao

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The impact of particle production during inflation on the primordial curvature perturbation spectrum is investigated both analytically and numerically.

We obtain an oscillatory behavior on small scales, while on large scales the spectrum is unaffected.
The amplitude of the oscillations is proportional to the number of coupled fields, their mass, and the square of the coupling constant.
The oscillations are due a discontinuity in the second time derivative of the inflaton, arising from a temporary violation of the slow-roll conditions.

Effects of particle production during inflation · Around

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A. A. Starobinsky, JETP Lett. 55
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J. A. Adams, B. Cresswell and R. Easther, Phys. Rev. D 64
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Then

J. O. Gong, JCAP 0507
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Later among the works it cites.
D. Boyanovsky, H. J. de Vega and N. G. Sanchez, Phys. Rev. D 74
2006
Later among the works it cites.
M. Joy, V. Sahni and A. A. Starobinsky, Phys. Rev. D 77
Original
2008
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