Curvature perturbation at the local extremum of the inflaton's potential

Details Curvature perturbation at the local extremum of the inflaton's potential Curvature perturbation at the local extremum of the inflaton's potential

2001-04-09

arxiv.org/abs/hep-ph/0104083v2

Phys.Lett. B524 (2002) 15-20

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 1 figure. To appear in Physics Letters B

Scientific paper

10.1016/S0370-2693(01)01369-7

The spectrum of curvature perturbation generated during inflation is studied
in the case the inflation-driving scalar field (inflaton) $\phi$ crosses over
its potential extremum. It is shown that the nondecaying mode of perturbation
has a finite value and a proper formula is given. The result is also extended
to more general cases where $\ddot{\phi}$ is non-negligible.

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