Generating the Curvature Perturbation at the End of Inflation in String Theory | Zendy

David H. Lyth | Zendy; Antonio Riotto | Zendy

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Generating the Curvature Perturbation at the End of Inflation in String Theory

Author(s) -

David H. Lyth,

Antonio Riotto

Publication year - 2006

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.97.121301

Subject(s) - inflaton , physics , brane , curvature , inflation (cosmology) , string theory , brane cosmology , perturbation (astronomy) , warp drive , classical mechanics , d brane , annihilation , false vacuum , quantum electrodynamics , theoretical physics , particle physics , quantum mechanics , geometry , mathematics

In brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the brane. We show that a significant, and possibly dominant, contribution to the curvature perturbation is generated at the end of inflation through the vacuum fluctuations of fields, other than the inflaton, which are light during the inflationary trajectory and become heavy at the brane-antibrane annihilation. These fields appear generically in string compactifications where the background geometry has exact or approximate isometries and parametrize the internal angular directions of the brane

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