Old Inflation in String Theory | Zendy

Luigi Pilo | Zendy; Antonio Riotto | Zendy; Alberto Zaffaroni | Zendy

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Old Inflation in String Theory

Author(s) -

Luigi Pilo,

Antonio Riotto,

Alberto Zaffaroni

Publication year - 2004

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2004/07/052

Subject(s) - inflaton , physics , inflation (cosmology) , theoretical physics , vacuum energy , string theory , false vacuum , brane cosmology , curvature , back reaction , vacuum state , metric (unit) , classical mechanics , quantum mechanics , geometry , mathematics , operations management , economics

We propose a stringy version of the old inflation scenario which does notrequire any slow-roll inflaton potential and is based on a specific example ofstring compatification with warped metric. Our set-up admits the presence ofanti-D3-branes in the deep infrared region of the metric and a false vacuumstate with positive vacuum energy density. The latter is responsible for theaccelerated period of inflation. The false vacuum exists only if the number ofanti-D3-branes is smaller than a critical number and the graceful exit frominflation is attained if a number of anti-D3-branes travels from theultraviolet towards the infrared region. The cosmological curvatureperturbation is generated through the curvaton mechanism.Comment: 31 pages, 3 figures; typos corrected and reference adde

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